Back Flow Preventer Assembly Check Valves
Last Updated: April 1, 2025
Description
Back Flow Preventer Assembly Check Valves are designed to prevent the reverse flow of fluids in a piping system. They are crucial in maintaining the directionality of fluid flow, ensuring that the fluid moves in the intended direction and does not flow backward, which could lead to contamination or system inefficiencies.
Working Principle
Back Flow Preventer Assembly Check Valves operate by utilizing a series of check valves and shut-off valves. These components work together to ensure that fluid flows in only one direction. The check valves automatically close when the flow of fluid reverses, preventing backflow. This mechanism is particularly useful in high-hazard environments where the integrity of the fluid flow must be maintained even if one part of the system fails. The assembly may also include test cocks for monitoring and maintenance purposes, enhancing their reliability and safety in critical applications .
Applications
Back Flow Preventer Assembly Check Valves are commonly used in various systems where preventing backflow is critical. Specific examples include:
- HVAC Systems: To ensure that the heating and cooling fluids circulate correctly without contamination.
- Irrigation Systems: To prevent contaminated water from flowing back into the clean water supply.
- Fire Suppression Systems: To maintain the integrity of the water supply used for fire suppression, ensuring it is free from contaminants.
- General Industrial Systems: Where the prevention of backflow is necessary to protect equipment and maintain process integrity .
Advantages over other Manufacturing - Vacuum Equipment
Back Flow Preventer Assembly Check Valves offer several advantages over other types of valves used in manufacturing and vacuum equipment. They provide a higher level of safety and reliability in preventing backflow, especially in high-hazard environments. Unlike simple check valves, these assemblies are designed to maintain flow integrity even if one component fails, offering a robust solution for critical applications .
Limitations
One limitation of Back Flow Preventer Assembly Check Valves is that they may not be suitable for applications requiring sterile conditions, as they can be difficult to clean thoroughly. Additionally, dirt and debris can cause excessive wear on the valve components, potentially leading to maintenance issues or failure if not properly managed .
Considerations
When considering the use of Back Flow Preventer Assembly Check Valves, several factors should be taken into account:
- Initial Costs: These assemblies can be more expensive upfront compared to simple check valves due to their complexity and additional components.
- Operating Expense: Maintenance and testing are necessary to ensure continued reliability, which can add to operating costs.
- Durability: While generally durable, the presence of dirt and debris can affect longevity, necessitating regular inspection and cleaning.
- Accuracy: The assembly's ability to prevent backflow is highly reliable, making it suitable for critical applications.
- Replacement and Maintenance Costs: Regular maintenance is required to ensure optimal performance, and replacement parts may be needed over time due to wear and tear .
from Radwell International
BACKFLOW PREVENTER, DOUBLE CHECK VALVE, W/ BALL VALVES & SAE TESTCOCKS, 1-INCH. FREE 2 YEAR RADWELL WARRANTY [See More]
- Valve Type: Back Flow
from Radwell International
DOUBLE CHECK BACKFLOW PERVENTER, 3/4 INCH SIZE, CAST BRONZE BODY, 175 PSI MAX WATER, 180 F MAX TEMP, 350 PSI MAX HYDROSTATIC TEST PRESSURE. FREE 2 YEAR RADWELL WARRANTY [See More]
- Valve Type: Back Flow
- Media: Water
from Radwell International
3/4 INCH BRONZE DUAL CHECK VALVE BACKFLOW PREVENTER, INTERMEDIATE ATMOSPHERIC VENT, FEMALE UNION INLET/OUTLET CONNECTION, VIEGA PROPRESS ADAPTORS. FREE 2 YEAR RADWELL WARRANTY [See More]
- Valve Type: Back Flow
- Connection Description: Union
from Radwell International
DUAL CHECK VALVE, WITH INTERMEDIATE ATMOSPHERIC VENT, BACKFLOW PREVENTER, MAX BACKFLOW TEMPERATURE: 250 DEGREES FARENHEIT, 175 MAX PSI, 1/2 INCH VALVE DIAMETER. FREE 2 YEAR RADWELL WARRANTY [See More]
- Valve Type: Back Flow
from Radwell International
1/2 IN LEAD FREE DOUBLE CHECK VALVE BACKFLOW PREVENTER ASSEMBLY, QUARTER TURN SHUTOFF, SINGLE TOP ENTRY. FREE 2 YEAR RADWELL WARRANTY [See More]
- Valve Type: Back Flow
from Radwell International
DUAL CHECK VALVE ASSEMBLY, BACKFLOW PREVENTER, 1/2" MODEL 760. FREE 2 YEAR RADWELL WARRANTY [See More]
- Valve Type: Back Flow
- Media: Air
from Radwell International
SINGLE CHECK KIT, FOR USE WITH FEBCO BACKFLOW (1-1/2 TO 2 IN). FREE 2 YEAR RADWELL WARRANTY [See More]
- Valve Type: Back Flow
from Radwell International
3/4 TO 1 IN BACKFLOW REPAIR KIT, FIRST CHECK RUBBER PARTS KIT, 009. FREE 2 YEAR RADWELL WARRANTY [See More]
- Valve Type: Back Flow
from Radwell International
DISCONTINUED BY MANUFACTURER, RK 909M1-RT1-1/4-2, COMPLETE PARTS KIT FOR 1-1/4" THRU 2" 909 WATTS BACKFLOW PREVENTER, INCLUDES: THE RELIEF VALVE & THE CHECK VALVES: DISC ASSEMBLY, SEAT O-RINGS, RELIEF VALVE DIAPHRAGM & O-RINGS, PISTON O-RINGS & LUBRICANT. FREE 2 YEAR RADWELL WARRANTY [See More]
- Valve Type: Back Flow
from Radwell International
FIRST CHECK VALVE KIT 6IN BACKFLOW PREVENTER. FREE 2 YEAR RADWELL WARRANTY [See More]
- Valve Type: Back Flow
from General Pipe Cleaners
Flood-Guard ™ operates like a check valve to seal off water back-up caused by overloaded sewers. Water flows normally through the drain until the sewer begins to back up. Then the Flood-Guard ™ float rises to seal off the drain opening until the water recedes. A screwdriver and a couple... [See More]
- Valve Type: Back Flow
- Valve Size: 2.00 to 4.00
- Material Of Construction: Stainless Steel; Rubber
- Connection Description: Tube Fitting
from FEBCO
MasterSeries® backflow prevention assemblies aren't just Lead Free. We also redesigned the check and relief valves for superior performance. [See More]
- Valve Type: Double Check (optional feature); Back Flow
- Valve Size: 2.50 to 10.00
- Material Of Construction: Ductile Iron
- Connection Description: BoltFlange
from Flomatic Valves
DUAL CHECK VALVE - 316 stainless steel body with single union. Temp Max: 180 °F(80 °C). Pressure Max: 175 PSI. Complies with ASSE 1024. For reference use only. Please check Flomatic's website for the latest valve product specifications. [See More]
- Valve Type: Double Check; Back Flow
- Valve Size: 0.75 to 1.25
- Material Of Construction: Stainless Steel
- Maximum Pressure: 175.00
from Red Valve Company, Inc.
A Revolutionary Design for Backflow Prevention. Tideflex Duckbill Check Valves have low headloss and achieve the tightest possible seal for backflow operations, particularly at low flow rates. The flexibility of the Tideflex Check Valve allows the valve to compress around trapped solids, providing a... [See More]
- Valve Type: Duckbill; Back Flow
- Valve Size: 4.00 to 102.00
- Material Of Construction: Rubber
- Connection Description: BoltFlange; Slip on
from Ames Fire & Waterworks
The Series 3000BM1 Double Check Detector Assembly (DCDA) is specifically designed to protect against possible backpressure and backsiphonage conditions for non-health hazard (i.e., pollutant) application in accordance with Local Governing Water Utility Code. This device assembly is primarily used on... [See More]
- Valve Type: Double Check; Back Flow
- Valve Size: 2.00
- Material Of Construction: Brass / Bronze
- Maximum Pressure: 175.00
from Check-All Valve Mfg. Co.
The Bushing Valve is a check valve with a standard bushing housing. The valve is adaptable to many types of service applications. It has very little restriction and produces a low pressure drop. It can be used quite effectively in systems where flow and pressure drop are critical by the use of a... [See More]
- Valve Type: Lift Check; Poppet; Back Flow
- Valve Size: 0.50
- Material Of Construction: Brass / Bronze; Stainless Steel; Steel; Exotic Metal; Alloy 20, Alloy C-276, Titanium
- Connection Description: Threaded; Face Seal (optional feature); 3/8 NPT
from Zurn Industries LLC
Zurn Wilkins 40XL2 In-Line Soft-Seated Single Check Valve is designed for potable water applications. Often used to protect a backflow preventer from water systems pressure fluctuations and water hammer conditions. To view all options, see the Specification Sheet - BF-40XL2. Features And Benefits. [See More]
- Valve Type: Back Flow
- Media: Water
from Flomatic Valves
DUAL CHECK with ATMOSPHERIC VENT - Continuous pressure backflow preventer with an intermediate atmospheric vent, with double union ends. Complies with ASSE 1012, not for potable water. For reference use only. Please check Flomatic's website for the latest valve product specifications. [See More]
- Valve Type: Double Check; Back Flow
- Maximum Pressure: 175.00
- Valve Size: 0.75
- Media Temperature: 210
from Ames Fire & Waterworks
Series 2000B Double Check Valve Assemblies prevent the backflow of contaminated water into the potable water supply. It consists of a bronze body construction that is easy to maintain and service. Series 2000B is ideal at referenced cross-connections identified as non-health hazard applications. [See More]
- Valve Type: Double Check; Back Flow
- Valve Size: 0.50 to 2.00
- Material Of Construction: Brass / Bronze; Stainless Steel
- Maximum Pressure: 175.00
from Check-All Valve Mfg. Co.
The Butt Weld (B4) check valve is a one piece body machined from bar stock, eliminating porosity concerns and providing uniform density for more consistent welds. Made to ASME/ANSI B16.25 for schedule 40 pipe, it carries rugged, dependable Check-All trim with a wide variety of seat materials and... [See More]
- Valve Type: Lift Check; Poppet; Back Flow
- Valve Size: 0.50
- Material Of Construction: Stainless Steel; Steel; Exotic Metal; Alloy 20,Alloy C-276, Monel, Alloy B
- Connection Description: Butt Weld; Face Seal (optional feature)
from Zurn Industries LLC
The Zurn Wilkins 975XL2 Reduced Pressure Principle Backflow Preventer provides high hazard protection for potable water applications. The wye pattern, bronze body provides separate access to each check valve and the relief valve for servicing. To view all options, see the Specification Sheet -... [See More]
- Valve Type: Back Flow
- Media: Water
- Valve Size: 1.00
from Flomatic Valves
UNLEADED DUAL CHECK VALVE - Brass body with single union. Complies with ASSE 1024. For reference use only. Please check Flomatic's website for the latest valve product specifications. [See More]
- Valve Type: Double Check; Back Flow
- Valve Size: 0.50 to 1.00
- Material Of Construction: Brass / Bronze
- Maximum Pressure: 150.00
from Ames Fire & Waterworks
Series 2000B-FP Double Check Valve Assemblies with Gear Operated Slow Close Isolation Valves prevent the backflow of contaminated water into the potable water supply. It consists of a bronze body construction that is easy to maintain and service. Series 2000B-FP is ideal at referenced... [See More]
- Valve Type: Double Check; Back Flow
- Valve Size: 1.00 to 2.00
- Material Of Construction: Brass / Bronze
- Maximum Pressure: 175.00
from Check-All Valve Mfg. Co.
The Connector Valve is a check valve with a hex nipple or connector housing. It is designed to be used in installations where check valves with male pipe threads are required. The Connector Valve is adaptable for use as a check valve, vacuum breaker, or low pressure relief valve. Two valves used in... [See More]
- Valve Type: Lift Check; Poppet; Back Flow
- Valve Size: 0.50
- Material Of Construction: Aluminum (optional feature); Brass / Bronze; Stainless Steel; Steel; Exotic Metal; Alloy 20, Alloy C-276, Titanium
- Connection Description: Threaded; Face Seal (optional feature); 1/2 NPT
from Zurn Industries LLC
The Zurn Wilkins 975XL2 Reduced Pressure Principle Backflow Preventer provides high hazard protection for potable water applications. The wye pattern, bronze body provides separate access to each check valve and the relief valve for servicing. To view all options, see the Specification Sheet -... [See More]
- Valve Type: Back Flow
- Media: Water
from Ames Fire & Waterworks
Series LF4000B Reduced Pressure Zone Assemblies are designed to protect potable water supplies in accordance with national plumbing codes and water authority requirements. This series can be used in a variety of installa tions, including the prevention of health hazard cross connections in... [See More]
- Valve Type: Double Check; Back Flow
- Valve Size: 0.50 to 2.00
- Material Of Construction: Copper
- Maximum Pressure: 175.00
from Check-All Valve Mfg. Co.
The CAV series of valves are not catalog items but rather are custom designed and tailored to meet customer specific connections or valve configurations. If you have a check valve application where our standard catalog items do not quite match what you are looking for, contact our sales department... [See More]
- Valve Type: Cartridge (optional feature); Lift Check; Poppet; Back Flow
- Connection Description: Threaded (optional feature); Compression (optional feature); BoltFlange (optional feature); Clamp Flange (optional feature); Union (optional feature); Tube Fitting (optional feature); Butt Weld (optional feature); Socket Weld (optional feature); Face Seal (optional feature)
- Material Of Construction: Aluminum; Brass / Bronze; Stainless Steel (optional feature); Steel (optional feature); Exotic Metal; Titanium, Monel
- Media: Hydraulic; Air; Water; Hot Water; Cold Water ; Potable Water; Salt Water (optional feature); Gas; Gasoline / Diesel Fuel (optional feature); High Purity (optional feature); LP Gas (optional feature); Natural Gas (optional feature); Sour Gas (optional feature); Specialty Corrosive (optional feature); Steam; Liquids
from Zurn Industries LLC
The Zurn Wilkins 975XL Reduced Pressure Principle Backflow Preventer provides high hazard protection for non-potable water applications. The wye pattern, bronze body provides separate access to each check valve and the relief valve for servicing. To view all options, see the Specification Sheet -... [See More]
- Valve Type: Back Flow
- Media: Water
from Ames Fire & Waterworks
The Colt LFC300, LFC300N Double Check Detector Assemblies are used to prevent backflow of pollutants, that are objectionable but not toxic, from entering the potable water supply system. The Colt LFC300, LFC300N maybe installed under continuous pressure service and may be subjected to backpressure. [See More]
- Valve Type: Double Check; Back Flow
- Valve Size: 2.50 to 10.00
- Material Of Construction: Stainless Steel
- Maximum Pressure: 175.00
from Check-All Valve Mfg. Co.
Flange Insert valves are the ultimate check valves in flanged systems. They provide the simplest most economical way to install check valves in a piping system, the valve body automatically positions the valve and holds it in place while bolts are being installed and tightened. All that is required... [See More]
- Valve Type: Lift Check; Poppet; Back Flow
- Valve Size: 0.50
- Material Of Construction: Aluminum (optional feature); Brass / Bronze; Stainless Steel; Steel; Exotic Metal; FEP Encapsulator; PVC; PTFE
- Connection Description: BoltFlange; Face Seal (optional feature); 1-3/8" O.D. Flange
from Zurn Industries LLC
The Zurn Wilkins 975XL2 Reduced Pressure Principle Backflow Preventer provides high hazard protection for potable water applications. The wye pattern, bronze body provides separate access to each check valve and the relief valve for servicing. To view all options, see the Specification Sheet -... [See More]
- Valve Type: Back Flow
- Media: Water
- Valve Size: 1.25
from Ames Fire & Waterworks
The Maxim LFM300, LFM300N Double Check Detector Assemblies are used to prevent backflow of pollutants, that are objectionable but not toxic, from entering the potable water supply system. The Maxim LFM300, LFM300N may be installed under continuous pressure service and may be subjected to... [See More]
- Valve Type: Double Check; Back Flow
- Valve Size: 2.50 to 10.00
- Material Of Construction: Stainless Steel
- Maximum Pressure: 175.00
from Check-All Valve Mfg. Co.
The Check-All Flanged & Drilled check valve is a one-piece cast body valve with ANSI/ASME B16.5 Class 150 flanged ends. The HVFD series valve is used when higher flow rates and lower pressure drops are required. The valve is available in sizes 1 through 10 inches and standard materials of 316... [See More]
- Valve Type: Lift Check; Poppet; Back Flow
- Valve Size: 1.00
- Material Of Construction: Brass / Bronze; Stainless Steel; Steel
- Connection Description: BoltFlange; Face Seal (optional feature); 4-1/4" O.D. Flange
from Zurn Industries LLC
The Zurn Wilkins 975XL2 Reduced Pressure Principle Backflow Preventer provides high hazard protection for potable water applications. The wye pattern, bronze body provides separate access to each check valve and the relief valve for servicing. To view all options, see the Specification Sheet -... [See More]
- Valve Type: Back Flow
- Media: Water
- Valve Size: 0.50
from Ames Fire & Waterworks
Series M300Na Double Check Valve Assemblies are specifically designed for high flow fire systems to prevent the backflow of pollutants that are objectionable but not toxic, from entering into the potable water supply. Its compact housing consists of two independently operating bi-link check valves,... [See More]
- Valve Type: Double Check; Back Flow
- Valve Size: 2.50 to 4.00
- Material Of Construction: Stainless Steel
- Maximum Pressure: 175.00
from Check-All Valve Mfg. Co.
The Check-All Flanged & Drilled - PTFE Lined check valve is a one-piece body valve with ANSI/ASME flanged ends. The valve has a solid one-piece PTFE liner, which covers the flange faces out to the raised face diameter. All wetted surfaces are fluoropolymer (PTFE/FEP/PFA) including the FEP... [See More]
- Valve Type: Lift Check; Poppet; Back Flow
- Valve Size: 1.00
- Material Of Construction: Steel; FEP Encapsulator
- Connection Description: BoltFlange; Face Seal (optional feature); 4-1/4" O.D. Flange
from Zurn Industries LLC
The Zurn Wilkins 350 Double Check Valve Backflow Preventer provides low hazard protection for all applications. To view all options, see the Specification Sheet - Model 350. Features And Benefits. 2-1/2" double check valve assembly with epoxy coated ductile iron body. Short lay-length for small... [See More]
- Valve Type: Double Check; Back Flow
- Media: Water
from Ames Fire & Waterworks
Series 3000SS Double Check Detector Assemblies prevent the backflow of fire protection system substances from being pumped or siphoned into the potable water supply. It consists of a compact construction and short lay length, ideal for retrofit installations. It features a lightweight stainless... [See More]
- Valve Type: Double Check; Back Flow
- Valve Size: 2.50 to 12.00
- Material Of Construction: Stainless Steel
- Maximum Pressure: 175.00
from Check-All Valve Mfg. Co.
The Lined Pipe Insert valve is designed to mate between two flanges on most lined pipe systems. It provides the simplest most economical way to install a check valve in a lined piping system. No gaskets are required, just spread the flanges, center the valve and bolt the flanges together. Lined Pipe... [See More]
- Valve Type: Lift Check; Poppet; Back Flow
- Valve Size: 1.00
- Material Of Construction: Exotic Metal; FEP Encapsulator; PTFE
- Connection Description: BoltFlange; Face Seal (optional feature); 2" O.D. Flange
from Zurn Industries LLC
The Zurn Wilkins 350 Double Check Valve Backflow Preventer provides low hazard protection for all applications. To view all options, see the Specification Sheet - Model 350. Features And Benefits. 3" double check valve assembly with epoxy coated ductile iron body - flanged OS &Y gate valves. [See More]
- Valve Type: Double Check; Back Flow
- Media: Water
from Ames Fire & Waterworks
Series M300, M300N Double Check Valve Assemblies are specifically designed for high flow fire systems to prevent the backflow of pollutants that are objectionable but not toxic, from entering into the potable water supply. Its compact housing consists of two independently operating tri-link check... [See More]
- Valve Type: Double Check; Back Flow
- Valve Size: 2.50 to 10.00
- Material Of Construction: Stainless Steel
- Maximum Pressure: 175.00
from Check-All Valve Mfg. Co.
The Check-All Mini-Check is a three piece constructed check valve. The valve is designed for minimum pressure drops. The three piece construction permits many combinations of end fittings, which makes the valve adaptable for nearly every application. The Mini-Check is available with 1/8, 1/4, and... [See More]
- Valve Type: Lift Check; Poppet; Back Flow
- Valve Size: 0.12
- Material Of Construction: Brass / Bronze; Stainless Steel; Steel; Exotic Metal; Titanium
- Connection Description: Threaded (optional feature); Compression (optional feature); Tube Fitting; Face Seal (optional feature); 1/8 Pipe Size
from Zurn Industries LLC
The Zurn Wilkins 350A Double Check Valve Backflow Preventer provides low hazard protection for all market segments. The grooved, epoxy coated ductile iron body is available with multiple shut-off valve options for installation versatility. To view all options, see the Specification Sheet - 350A. [See More]
- Valve Type: Double Check; Back Flow
- Media: Water
from Ames Fire & Waterworks
Series 3000SE Double Check Detector Assembly is ideal for space restricted retrofit installations. It's long life 300 Series stainless steel housing, along with the cartridge check assembly substantially reduces the need to service or repair the assembly. This model is 100% lead free through the... [See More]
- Valve Type: Double Check; Back Flow
- Valve Size: 2.50
- Material Of Construction: Stainless Steel
- Maximum Pressure: 175.00
from Check-All Valve Mfg. Co.
The Sanitary Cartridge Valve is a 316 stainless steel check valve for use in new or existing sanitary systems. The SCV design seals on the ID of sanitary ferrules with replaceable food grade seals (Standard is FDA EPDM). The valves fit the Alfa Laval Inc. Bevel Seat and Tri-Clamp ® fittings, the... [See More]
- Valve Type: Cartridge; Lift Check; Poppet; Back Flow
- Valve Size: 0.75
- Material Of Construction: Stainless Steel
- Connection Description: Clamp Flange (optional feature); Union (optional feature); Butt Weld; Face Seal (optional feature); 3/4" Line Size
from Zurn Industries LLC
The Zurn Wilkins 350A Double Check Valve Backflow Preventer provides low hazard protection for all market segments. The grooved, epoxy coated ductile iron body is available with multiple shut-off valve options for installation versatility. To view all options, see the Specification Sheet - 350A. [See More]
- Valve Type: Double Check; Back Flow
- Media: Water
from Ames Fire & Waterworks
Series 2000SS Double Check Valve Assemblies prevent the backflow of polluted water from entering into the potable water supply. It consists of a compact construction and short lay length, ideal for retrofit installations. It features a lightweight stainless steel body and low head loss. Series... [See More]
- Valve Type: Double Check; Back Flow
- Valve Size: 2.50 to 12.00
- Material Of Construction: Stainless Steel
- Maximum Pressure: 175.00
from Check-All Valve Mfg. Co.
For over 35 years, the compact, fluoropolymer (PTFE/FEP/PFA), Sanitary Insert Valve has been used as the most economical solution to providing a check valve in a new or existing sanitary piping system. This valve style is designed to fit into grooved-end clamp-type fittings. Since the Sanitary... [See More]
- Valve Type: Lift Check; Poppet; Back Flow
- Valve Size: 0.75
- Material Of Construction: FEP Encapsulator; PTFE
- Connection Description: Clamp Flange; Butt Weld; Face Seal (optional feature); 3/4" Line Size
from Zurn Industries LLC
Irrigation backflow preventer 2-975XL with wye pattern provides high hazard protection for your commercial water applications. This backflow device has two check valves which are accessible tor maintenance without removing the relief valve at the entire device from the line. To view all options, see... [See More]
- Valve Type: Back Flow
- Media: Water
from Ames Fire & Waterworks
Series C200, C200N Double Check Valve Assemblies prevent the backflow of pollutants that are objectionable but not toxic, from entering into the potable water supply. Its compact housing consists of two independently operating tri-link check valves, two shutoff valves, and four test cocks. It... [See More]
- Valve Type: Double Check; Back Flow
- Valve Size: 2.50 to 10.00
- Material Of Construction: Stainless Steel
- Maximum Pressure: 175.00
from Check-All Valve Mfg. Co.
The 3-A Sanitary Check Valve is an all 316/316L stainless steel check valve with a standard 32 Ra or better finish, (finer available) for use in new or existing sanitary systems. The 3SC design seals on the ID of sanitary ferrules with 3-A specified materials (standard is EPDM). The valve seals... [See More]
- Valve Type: Lift Check; Poppet; Back Flow
- Valve Size: 1.00
- Material Of Construction: Stainless Steel
- Connection Description: Clamp Flange; 1" Line Size
from Ames Fire & Waterworks
Series M200, M200N Double Check Valve Assemblies are specifically designed for high flow fire systems to prevent the backflow of pollutants that are objectionable but not toxic, from entering into the potable water supply. Its compact housing consists of two independently operating tri-link check... [See More]
- Valve Type: Double Check; Back Flow
- Valve Size: 2.50 to 10.00
- Material Of Construction: Stainless Steel
- Maximum Pressure: 175.00
from Check-All Valve Mfg. Co.
The Straight Sided Insert is a thread less check valve. designed to be inserted into any cavity where a check valve is needed and threads are not desired. Available Materials: 316 Stainless Steel (SS). Carbon Steel (CS). Alloy 20 (A2). Alloy C-276 (HC). Brass (BR). Alloy B (HB). MONEL ® (MO) [See More]
- Valve Type: Lift Check; Poppet; Back Flow
- Valve Size: 0.50
- Material Of Construction: Brass / Bronze; Stainless Steel; Steel; Exotic Metal; Alloy 20, Alloy C-276,, Titanium
- Connection Description: Compression; Face Seal (optional feature); 5-23/64" O.D. Flange
from Ames Fire & Waterworks
Series M200Na Double Check Valve Assemblies are specifically designed for high flow fire systems to prevent the backflow of pollutants that are objectionable but not toxic, from entering into the potable water supply. Its compact housing consists of two independently operating bi-link check valves,... [See More]
- Valve Type: Double Check; Back Flow
- Valve Size: 2.50 to 4.00
- Material Of Construction: Stainless Steel
- Maximum Pressure: 175.00
from Check-All Valve Mfg. Co.
The Tubing Check Valve-Flared is a three piece constructed valve with 37 º flared ends which conform to J. I. C. and S. A. E. Hydraulic Standards. These valves are designed for maximum flow with minimal pressure drop. Available Materials: 316 Stainless Steel (SS). Brass (BR). Carbon Steel (CS) [See More]
- Valve Type: Lift Check; Poppet; Back Flow
- Valve Size: 0.25
- Material Of Construction: Brass / Bronze; Stainless Steel; Steel; Exotic Metal; Titanium
- Connection Description: Threaded; Tube Fitting (optional feature); Face Seal (optional feature); 1/4" Tubing Size
from Check-All Valve Mfg. Co.
The Tubing Check Valve is a three piece constructed check valve with flareless tube ends. The valve is designed for minimum pressure drops. The valves are furnished complete with ferrules and nuts. Available Materials: 316 Stainless Steel (SS). Brass (BR). Carbon Steel (CS) [See More]
- Valve Type: Lift Check; Poppet; Back Flow
- Valve Size: 0.12
- Material Of Construction: Brass / Bronze; Stainless Steel; Steel; Exotic Metal; Titanium
- Connection Description: Compression (optional feature); Tube Fitting; Face Seal (optional feature); 1/8" Tubing Size
from Check-All Valve Mfg. Co.
The Union Insert Valve is the threaded pipe counterpart of the Flange Insert Valve. Designed to be inserted into most standard ground joint unions, it provides the simplest and most economical way to install a check valve in a threaded pipe system. A check valve may be installed anywhere in the... [See More]
- Valve Type: Lift Check; Poppet; Back Flow
- Valve Size: 0.50
- Material Of Construction: Brass / Bronze; Stainless Steel; Steel; Exotic Metal; Alloy 20, Alloy C-276, Titanium
- Connection Description: Union; Face Seal (optional feature); 1/2" Line Size
from Check-All Valve Mfg. Co.
The Universal High Pressure check valve is a one piece body machined from bar stock with female pipe threads. The valve is designed and manufactured for high pressure applications. For applications below 3000 PSIG, view our UN-3 series. Available Materials: 316 Stainless Steel (SS). Alloy B (HB). [See More]
- Valve Type: Lift Check; Poppet; Back Flow
- Valve Size: 0.38
- Material Of Construction: Aluminum (optional feature); Stainless Steel; Steel; Exotic Metal; Alloy 20, Alloy C-276, Titanium
- Connection Description: Threaded; Face Seal (optional feature); 3/8 NPT
from Check-All Valve Mfg. Co.
The Universal Low Pressure check valve is a one piece body machined from bar stock and is designed for minimum pressure drop. The valve is light, compact, and provides maintenance free dependable service. For applications above 3000 PSIG, view our UN-10 series. For applications where weld joint are... [See More]
- Valve Type: Lift Check; Poppet; Back Flow
- Valve Size: 0.38
- Material Of Construction: Aluminum (optional feature); Brass / Bronze; Stainless Steel; Steel; Exotic Metal; Alloy 20, Alloy C-276, Titanium
- Connection Description: Threaded; Face Seal (optional feature); 3/8 NPT
from Check-All Valve Mfg. Co.
The Universal Socket Weld check valve is machined from bar stock and designed for a minimum pressure drop. It carries rugged, dependable Check-All trim and there is a wide variety of seat materials and cracking pressures to choose from. This valve series is particularly attractive when weld joints... [See More]
- Valve Type: Lift Check; Poppet; Back Flow
- Valve Size: 0.38
- Material Of Construction: Stainless Steel; Steel; Exotic Metal; Alloy 20, Alloy C-276, Titanium
- Connection Description: Socket Weld; Face Seal (optional feature); 3/8 Pipe Size
from Check-All Valve Mfg. Co.
The Wafer Insert (WV) valve is designed to fit between two mating ANSI flanges. Two gaskets are required, instead of the one normally used. The "drop in" valve body fits inside the bolt circle for quick installation and removal in rigid piping applications where the use of the F1, F6, or FP are not... [See More]
- Valve Type: Lift Check; Poppet; Wafer; Back Flow
- Valve Size: 0.50
- Material Of Construction: Brass / Bronze; Stainless Steel; Steel; Exotic Metal; Alloy 20, Alloy C-276, Titanium
- Connection Description: BoltFlange; Face Seal (optional feature); 1-3/8" O.D. Flange