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Valve Type:

Severe Service Rated?

Back Flow Preventer Assembly?

Material of Construction:

Valve Size:

Pressure Rating:

Media Temperature:

Flow (Cv):

Connection:

Media Description:

Agency / Standard:

Help with Check Valves specifications:

Valve Type
           
   Your choices are...         
   Ball / Disk Check Valves       Ball and cone check valves use a free-floating or spring-loaded ball, cone, or disk resting in a seat ring as the closure element. Upon reverse flow, the ball is forced back into its seat preventing backflow. 
   Cartridge / Manifold Valves       Cartridge valves are directional control valves that are inserted into manifolds to provide a cost-effective, compact system design. 
   Double Check Valves       Double check valves are assemblies that contain two distinct check valves. 
   Duckbill Valves       Duckbill valves are flow-sensitive, variable-area, check valves.  They get their name from their shape, which consists of two flaps shaped like a duck's bill. In zero flow conditions, the valve remains closed. As the flow increases, the pressure on the flaps increases and the valve opens. 
   Foot Valves       Foot valves are a type of check valve with a built-in strainer. They are used at the point of liquid intake to retain liquid in the system. 
   Lift Check Valves       Lift check valves use a free-floating closure element, consisting of a piston or poppet and a seat ring.  The piston or poppet actuates either horizontal or vertical to the flow, depending on the valve construction. 
   Poppet Check Valves       Poppet valves open and close ports with a sealing device composed of a disk, cone, or sphere that is pressed against the seating surface using a spring. 
   Swing Check Valves       Swing check valves are designed with the closure element attached to the top of the cap. The closure element can be pushed aside by the flow, but swings back into the close position upon flow reversal. 
   Umbrella Check Valves       Umbrella check valves are elastomeric self activating devices.  These valves simply press into a hole and can be designed to function within a specified pressure range.  The name umbrella comes from the general shape of the device. 
   Wafer / Split Disc Check Valves       Wafer and split disc check valves have two half-circle disks hinged together. Upon positive flow, the disc come together and retracts to a full-circle to close against reverse flow. 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
   Severe Service Rated       The valve is designated by manufacturer as being suitable for severe service applications where there is continuing operational, maintenance or reliability issues with a given application. 
   Search Logic:      "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.
   Back Flow Preventer Assembly       Back flow preventers are assemblies of two check valves and two shut-off valves. They may also include test cocks for each chamber within the assembly. 
   Search Logic:      "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.
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Material of Construction
           
   Your choices are...         
   Acetal       Acetal polymers are semi-crystalline. They offer excellent inherent lubricity, fatigue resistance, and chemical resistance. Acetal suffers from outgassing problems at elevated temperatures, and is brittle at low temperatures. Glass filled, and added lubrication grades are available, flame-retardant grades are not. Brand names include Celcon® (Hoechst Celanese), Delrin® (DuPont), Thermocomp® (LNP), Ultraform® (BASF), and Acetron® (DSM). 
   Aluminum       Aluminum is a bluish silver-white malleable ductile light trivalent metallic element that has good electrical and thermal conductivity, high reflectivity, and resistance to oxidation. 
   Brass / Bronze       Brass comes with good strength, excellent high temperature ductility and reasonable cold ductility, good conductivity, excellent corrosion resistance, good bearing properties and low magnetic permeability.  Sintered bronze is a porous material, which can be impregnated with oil, graphite or PTFE. Not suitable for heavily loaded applications but useful where lubrication is inconvenient. 
   Cast Iron       The term "cast iron" refers not to a single material, but to a family of materials whose major constituent is iron, with important trace amounts of carbon and silicon. Cast irons are natural composite materials whose properties are determined by their microstructures - the stable and metastable phases formed during solidification or subsequent heat treatment. The major microstructural constituents of cast irons are: the chemical and morphological forms taken by carbon, and the continuous metal matrix in which the carbon and/or carbide are dispersed. 
   CPVC       Chlorinated polyvinyl chloride (CPC) a higher type grade of plastic commonly used for hot / cold water distribution, sprinkler piping, and some chemicals. Suitable for high temperatures. 
   Copper       A common reddish metallic element that is ductile and malleable and is one of the best conductors of heat and electricity. 
   Ductile Iron       Ductile iron retains cast iron's machinability and corrosion-resistance, and provides additional strength, toughness, and ductility. Although it’s chemical properties are similar to those of cast iron, ductile iron incorporates significant casting refinements, additional metallurgical processes, and superior quality control. 
   Exotic Metal       Exotic metals and alloys have specialized properties. This category includes materials such as Hastelloy®, Monel®, beryllium copper, beryllium nickel, niobium, tantalum, titanium and zirconium. 
   Polyethylene (PE)       Commodity thermoplastic that is soft, flexible and tough - even at low temperatures - with outstanding electrical properties but poor temperature resistance. It also has very good chemical resistance but is prone to environmental stress cracking; it has poor UV resistance (unless modified) and poor barrier properties, except to water. 
   Polypropylene (PP)       Polypropylene is a thermoplastic material exhibiting excellent cold flow, bi-axial strength, and yield elongation properties. It is similar to PVC but can be used in exposed applications because of its resistance to UV, weathering, and ozone. 
   PTFE - Teflon®       Polytetrafluoroethylene (PTFE) is an insoluble compound that exhibits a high degree of chemical resistance and a low coefficient of friction. It is sometimes marketed in proprietary classes of materials such as Teflon®, a registered trademark of DuPont Dow Elastomers. 
   PVC       Polyvinyl Chloride (PVC) is a widely used material that has good flexibility, smooth surface, and nontoxic qualities. Some grades are used in food and chemical processes due to the inert nature of PVC. Brand names include: ACP® and Dural® (Alpha Gary), Geon® (Geon), Benvic® (Solvay), Flexalloy® (Teknor Apex). 
   PVDF       Polyvinylidene fluoride (PVDF) is a melt processable fluoropolymer. It is similar in properties to other fluoropolymer, but has better strength and lower creep than the other members of this family. PVDF has good wear resistance, and excellent chemical resistance. But does not perform well at elevated temperatures. Brand names include: Kynar® (Elf AtoChem). 
   Rubber       Any of several material compositions with properties similar to natural rubber. 
   Stainless Steel       Stainless steel is chemical and corrosion resistant and can have relatively high-pressure ratings. 
   Steel       Steel is a commercial iron that contains carbon in any amount up to about 1.7 percent as an essential alloying constituent. It is malleable when under suitable conditions, and is distinguished from cast iron by its malleability and lower carbon content. 
   Other       Other unlisted, specialized, or proprietary material. 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
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Specifications
   Valve Size       Valve size is the designated size of the valve by manufacturer.  This typically represents the size of the passage opening. 
   Search Logic:      User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
   Pressure Rating       Maximum safe pressure value for which the valve is rated. 
   Search Logic:      User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
   Media Temperature       Maximum temperature of media the valve is designed to accommodate. 
   Search Logic:      User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
   Flow (Cv)       The valve flow coefficient is the number of U.S. gallons per minute of 60 degree F water that will flow through a valve at a specified opening with a pressure drop of 1 psi across the valve. It is used to predict flow rates. 
   Search Logic:      User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
   Connection       
   Your choices are...         
   Threaded       The valve has internal or external threads for inlet or outlet connection(s). 
   Compression Fitting       A sealed pipe connection without soldering or threading. As the nut on one fitting is tightened, it compresses a washer around the second pipe, forming a watertight closure. 
   Bolt Flange       The valve has a bolt flange(s) for inlet or outlet connection. 
   Clamp Flange       The valve has a clamp flange(s) for inlet or outlet connection. 
   Union       The valve has a union connection for inlet or outlet connection(s). 
   Tube Fitting       The valve has a connection for directly joining tubing at the inlet and/or outlet connections. 
   Butt Weld       The valve has a butt weld sized connection for inlet or outlet connection. 
   Socket Weld / Solder       The valve has a socket weld connection for inlet or outlet connection. 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
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Media Description
           
   Your choices are...         
   Air       The valve can handle all types of non-pressurized air. 
   Compressed Air       Compressed air is under a pressure greater than atmosphere. 
   Water       Any type of water. 
   Hot Water       Water that has been heated. 
   Cold Water       Unheated water to cool. 
   Potable Water       Potable water is considered safe and fit for human consumption, culinary and domestic purposes and meets the requirements of the health authority having jurisdiction. 
   Salt Water       Water has a high concentration of salt, often from the ocean or sea. 
   Wastewater       Wastewater is the spent or used water of a community or industry that contains dissolved and suspended matter. 
   Gas       Any type of gas, although generally excluding air. 
   Gasoline / Diesel Fuel       Gasoline / diesel fuel is a mixture of flammable liquid hydrocarbons derived chiefly from crude petroleum and used as a fuel for internal-combustion engines. 
   High Purity Gas       High purity gas is designated by manufacturer as being applicable and built for high purity applications - includes nitrogen, argon, oxygen, hydrogen, and H.P. mixtures. 
   LP - Gas       Liquefied petroleum is a gas containing specific hydrocarbons that are gaseous under normal atmospheric conditions, but can be liquefied under moderate pressure and temperatures. Propane and butane are examples. 
   Natural Gas       Natural gases are liquid hydrocarbon mixtures that are gaseous at reservoir temperatures and pressures, but are recoverable by condensation or absorption. 
   Sour Gas       Sour gas is hydrogen sulfide (H2S) laden gas. 
   Specialty / Corrosive Gases       Specialty corrosive gases. 
   Hydraulic Fluid       Hydraulic valves contain and transfer the flow and pressure of hydraulic fluid in hydraulic power systems. They range from simple shutoff valves to precise control valves used in motion control systems. 
   Powder / Solids       Media in solid or powder state. 
   Steam       Water in a gaseous state at a temperature above its boiling point. 
   Other       Other unlisted, specialized, or proprietary media. 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
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Agency / Standard
           
   Your choices are...         
   ANSI       Meets American National Standards Institute (ANSI) standards. 
   API       Meets American Petroleum Institute (API) Standards 
   ASME       Meets American Society of Mechanical Engineers (ASME) standards. 
   AWWA       Meets American Water Works Association Certified (AWWA). 
   MSS       Meets Manufacturers Standardization Society (MSS) specifications. 
   DIN       Conforms to a DIN standard of configuration. 
   ISO       Meets International Organization for Standardization requirements. 
   NSF       Meets National Sanitation Federation (NSF) standards. 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
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