Socket Weld / Solder Check Valves
Last Updated: April 1, 2025
Description
Socket Weld / Solder Check Valves are designed to allow fluid to flow through them in one direction only, preventing backflow. They are typically used in piping systems where a permanent, leak-proof connection is required. The socket weld or solder connection ensures a strong and durable bond between the valve and the piping.
Working Principle
Socket Weld / Solder Check Valves operate by utilizing a mechanism that opens to allow flow in the forward direction and closes to prevent flow in the reverse direction. This is typically achieved through a disc or ball that moves in response to the pressure differential across the valve. When the upstream pressure is greater than the downstream pressure, the valve opens, allowing fluid to pass through. Conversely, when the downstream pressure exceeds the upstream pressure, the valve closes, preventing backflow. This functionality is crucial in maintaining the integrity and efficiency of fluid systems by ensuring unidirectional flow.
Applications
Socket Weld / Solder Check Valves are commonly used in high-pressure applications where a secure and permanent connection is necessary. Specific examples include their use in hydraulic systems, chemical processing plants, and oil and gas pipelines. They are also employed in systems where extreme temperatures are present, as the soldered or welded connections can withstand significant thermal stress.
Advantages over other Manufacturing - Vacuum Equipment
Socket Weld / Solder Check Valves offer several advantages over other types of valves used in vacuum equipment. Their robust connection method ensures minimal leakage, which is critical in maintaining vacuum conditions. Additionally, the permanent nature of the connection reduces the risk of joint failure under vacuum pressure, providing a more reliable solution compared to threaded or flanged connections.
Limitations
One limitation of Socket Weld / Solder Check Valves is the difficulty in disassembling them for maintenance or inspection due to their permanent connection. This can lead to increased downtime and labor costs if repairs are needed. Additionally, the soldering or welding process requires skilled labor and can be time-consuming, which may not be ideal for applications requiring frequent modifications or adjustments.
Considerations
When selecting Socket Weld / Solder Check Valves, several factors should be considered. Initial costs may be higher due to the need for skilled labor during installation. However, the durability and leak-proof nature of the connection can lead to lower operating expenses over time. Maintenance and replacement costs should also be considered, as the permanent connection can complicate repairs. The accuracy of the valve's operation is generally high, but regular inspection is recommended to ensure continued performance.
from Radwell International
DISCONTINUED BY MANUFACTURER, 1 IN. STAINLESS STEEL SOCKET WELD CHECK VALVE. FREE 2 YEAR RADWELL WARRANTY [See More]
- Connection Description: Socket Weld
- Material Of Construction: Stainless Steel; Steel
from Cooper Valves
COOPER ® Valves cast check valves have a simple yet reliable design that allows them to perform with low pressure drop and excellent seat tightness. The Cooper cast check valve is also available for cryogenic service with an extended bonnet. Cast check valves larger than 12 ” are available... [See More]
- Connection Description: Threaded; BoltFlange; Butt Weld; Socket Weld; RFF BW RTJ
- Material Of Construction: Stainless Steel; Exotic Metal; Nickel Alloy, Monel, Hastelloy, Incoloy, Inconel,Titanium Alloy, Zirconium Alloy
- Valve Type: Swing; Severe Service
- Valve Size: 0.50 to 24.00
from GF Piping Systems
GF Piping Systems plastic check valves provide minimum pressure loss and can be mounted horizontally or vertically. Our check valves offer good flow characteristics and compact design. Types: Types 561 and 562 ring in a new generation of valves, featuring more safety, simplicity,. Type 301 Y-Globe... [See More]
- Connection Description: BoltFlange (optional feature); Tube Fitting; Butt Weld (optional feature); Socket Weld; Fusion
- Material Of Construction: ABS; PVC; CPVC; PP; PVDF
- Valve Type: BallDisk; Swing; Wafer
- Valve Size: 0.38 to 12.00
from Hayward Flow Control
SLC Series Y-Check valves are available in PVC only. Seals are FPM or EPDMand are offered in threaded body version only. True union end connections are available in socket or threaded styles. All valves are assembled with silicone free lubricant. Features. PVC. Full Flow Design. Closes with No Back... [See More]
- Connection Description: Threaded; Socket Weld
- Valve Size: 0.50 to 4.00
- Material Of Construction: PVC
- Maximum Pressure: 150.00
from Velan, Inc.
A complete range of gate, globe and check valves for all of your high pressure and high temperature applications, proven over years of service in thermal and nuclear power plants as well as oil and gas industry applications around the world. Only Velan offers the advantages of one-piece forged... [See More]
- Connection Description: Butt Weld; Socket Weld; Socket weld, Butt weld
- Media: Water; Wastewater; Steam
- Valve Size: 2.50 to 14.00
- Agency: ASME
from Armstrong International
Armstrong ’s SSW and SBW Series are designed and constructed for low pressure drop refrigerant shut-off valves. The stop valves are welded directly to steel piping, thereby eliminating potential leaky flanges or threaded joints and simplifying installations. Features: Refrigerants: suitable... [See More]
- Connection Description: Butt Weld; Socket Weld
- Valve Size: 0.50 to 1.25
- Material Of Construction: Stainless Steel
- Maximum Pressure: 365.00
from Danfoss A/S
SCA-X are check and stop valves with built-in stop valve function. SCA-X valves are available in angleway versions. The valves are designed to open at very low differential pressures, allow favourable flow conditions and are easy to disassemble for inspection and service. SCA-X valves are equipped... [See More]
- Connection Description: Socket Weld
- Valve Size: 0.59 to 4.92
- Material Of Construction: Copper
- Maximum Pressure: 942.75
from Curtiss-Wright, Valve Group
Curtis Wright provides a variety of industrial grade check valves that meet the harsh environments suitable for applications such as power and oil, petrochemical, hydrocarbon service, seawater cooling systems, offshore applications. Curtiss-Wright check valves are supplied through their Phonix,... [See More]
- Connection Description: BoltFlange; Butt Weld; Socket Weld
- Material Of Construction: Stainless Steel; Steel; Exotic Metal
- Valve Type: BallDisk; Swing; Severe Service
- Valve Size: 0.50 to 24.00
from U.S. Plastic Corporation
This 2-1/2" swing check valve in the open position allows for unobstructed continuous flow with minimal head loss. Swing check valves are designed for horizontal installation. All check valves must be installed with the flow-arrow pointing in the direction of the flow of the system and with the flow... [See More]
- Connection Description: Socket Weld
- Material Of Construction: PVC
- Valve Type: Swing
- Valve Size: 2.50
from NIBCO INC.
Corzan ® CPVC 80 valves for use with hot corrosive liquids, chemical processing, industrial plating, chilled water distribution, deionized water lines, chemical drainage and waste water treatment systems. Valve pressure rating 250 psi at 73 °F water non-shock full-port, Maximum service... [See More]
- Connection Description: Threaded; Union; Socket Weld
- Material Of Construction: CPVC
- Valve Type: BallDisk
- Valve Size: 0.50 to 6.00
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]
- Connection Description: Socket Weld; Face Seal (optional feature); 3/8 Pipe Size
- Material Of Construction: Stainless Steel; Steel; Exotic Metal; Alloy 20, Alloy C-276, Titanium
- Valve Type: Lift Check; Poppet; Back Flow
- Valve Size: 0.38
from Xiamen Landee Industries Co., Ltd.
Forged Steel Valves, Meeting International Standards. Model Number: LD 007-FST. Key Specifications/Special Features: Type: gate, globe, check, needle, etc. Manufacturing standards: API, ANSI, BS, DIN, JIS. Size range: from 1/8 inch to 2-1/2 inch (DN6mm - DN65mm). Pressure: from ANSI class 150 to... [See More]
- Connection Description: Threaded; Butt Weld; Socket Weld; Flanged
- Valve Size: 0.12 to 2.50
- Material Of Construction: Steel; Carbon Steel
- Maximum Pressure: 150.00 to 2500.00
from Cooper Valves
Precise response. Faster closing. Excellent seat tightness. Those are the strong points of COOPER ® Valves forged check valves. [See More]
- Connection Description: Threaded; Socket Weld; SE SW TSW
- Material Of Construction: Stainless Steel; Exotic Metal; Nickel Alloy, Monel, Hastelloy, Incoloy, Inconel,Titanium Alloy, Zirconium Alloy
- Valve Type: Lift Check; Severe Service
- Valve Size: 0.50 to 2.00
from Hayward Flow Control
TC Series true union ball check valves are offered in PVC, Corzan CPVC, and PP. O-rings and seats are FPM or EPDM. 1/4 in. and 3/8 in. sizes are PVConly and are trim check design. They have socket or threaded end connections. Others up to 2 in. sizes have socket and threaded end connections. All... [See More]
- Connection Description: Threaded; Socket Weld
- Valve Size: 0.25 to 6.00
- Material Of Construction: Corzan; PVC; CPVC; PP
- Maximum Pressure: 150.00
from Velan, Inc.
A complete range of gate, globe and check valves for all of your high pressure and high temperature applications, proven over years of service in thermal and nuclear power plants as well as oil and gas industry applications around the world. Only Velan offers the advantages of one-piece forged... [See More]
- Connection Description: Butt Weld; Socket Weld; Socket weld, Butt weld
- Valve Size: 2.50 to 24.00
- Valve Type: Swing
- Media: Water; Wastewater
from Danfoss A/S
SCA-X SS are check and stop valves in stainless steel with a built-in stop valve function. SCA-X SS are available in angleway versions. The valves are designed to open at very low differential pressures, allow favourable flow conditions and are easy to disassemble for inspection and service. SCA-X... [See More]
- Connection Description: Socket Weld
- Valve Size: 0.59 to 1.57
- Material Of Construction: Copper
- Maximum Pressure: 754.20
from U.S. Plastic Corporation
Cepex PVC True Union Ball Check Valves with Foot Valve Screens with either EPDM or FKM O-Rings. 1/2" - 2" rated @ 240 psi and supplied with Socket/Threaded Combo End Connectors. 2-1/2" - 4" rated @ 150 psi and supplied with either Socket or Threaded End Connectors. Minimum return pressure: 3 psi. [See More]
- Connection Description: Socket Weld
- Valve Type: BallDisk
from NIBCO INC.
PVC Schedule 80 Valves for use with hot corrosive liquids, chemical processing, industrial plating, chilled water service, deionized water lines, vacuum service, and waste treatment systems. Valve pressure rating 250 psi at 73 °F water non-shock, Full port, Maximum service temperature 140... [See More]
- Connection Description: Threaded; BoltFlange; Union; Socket Weld
- Material Of Construction: PVC
- Valve Type: BallDisk
- Valve Size: 0.50 to 10.00
from Cooper Valves
Simple. Hard-working. Precise. Proven. COOPER ® Valves forged check valves have a simple yet reliable design that allows them to perform with low pressure drop and excellent seat tightness. [See More]
- Connection Description: Threaded; Socket Weld; SE SW TSW
- Material Of Construction: Stainless Steel; Exotic Metal; Nickel Alloy, Monel, Hastelloy, Incoloy, Inconel,Titanium Alloy, Zirconium Alloy
- Valve Type: Swing; Severe Service
- Valve Size: 0.50 to 2.00
from Hayward Flow Control
WC Series wafer check valves are offered in PVC, PP and PVDF. O-ring material is FPM, EPDM or PTFE encapsulated FPM. Sizes up to 8 in. are supplied with a spacer in PVC and PP materials only. Spacers are not required for DIN or PVDF pipe installations. Spacers allow full disk opening and are... [See More]
- Connection Description: Threaded; Tube Fitting; Socket Weld
- Material Of Construction: PVC; PP; PVDF
- Valve Type: Wafer
- Valve Size: 2.00 to 20.00
from Velan, Inc.
A comprehensive range of small forged gate, globe, check, angle and bellows seal valves with unique design features. Features and benefits. • Available types: Piston, Ball, Swing check [See More]
- Connection Description: Threaded; BoltFlange; Socket Weld; Threaded, Socket weld, Flanged
- Agency: ASME
- Valve Size: 0.25 to 2.00
from Danfoss A/S
CHV-X check valves are available in angleway versions. The valves are designed to open at very low differential pressures, allow favourable flow conditions and are easy to disassemble for inspection and service. Laser cut V-ports provide excellent opening characteristics (CHV-X 50-125). The valve... [See More]
- Connection Description: Socket Weld
- Valve Size: 1.26 to 4.92
- Material Of Construction: Copper
- Maximum Pressure: 754.20
from U.S. Plastic Corporation
GF 561 & 562 valves feature a unique check cone element design that optimizes flow geometry and minimizes flow resistance and pressure loss. The valve closes when vertically mounted with (561) 2.9 psi or (562) 1.45 psi. The check valve Type 562 (horizontal) closes absolutely leak-tight with the... [See More]
- Connection Description: Union; Socket Weld
- Material Of Construction: PVC
- Valve Type: BallDisk
- Valve Size: 0.38
from NIBCO INC.
Red Kynar ® (PVDF) valves for use with hot corrosive liquids, chemical processing, industrial plating, and waste treatment systems. Valve pressure rating 150 psi at 73 °F water non-shock full-port, Maximum service temperature 280 °F, Full port, True Bloc ® design, FKM O-ring, Female... [See More]
- Connection Description: Threaded; BoltFlange; Union; Socket Weld
- Material Of Construction: PP; PVDF
- Valve Type: BallDisk
- Valve Size: 0.50 to 4.00
from Hayward Flow Control
YC Series y-check valves are offered in PVC and Corzan CPVC. O-rings are FPM standard but EPDM is available. All sizes are either socket, threaded or flanged body style. True union socket or threaded end connections are available. For spring-loaded y-check valves, see the SLC Series. All valves are... [See More]
- Connection Description: Threaded; Socket Weld
- Valve Size: 0.50 to 4.00
- Material Of Construction: Corzan; PVC; CPVC; PP
- Maximum Pressure: 150.00
from Velan, Inc.
RAMA valves are designed for fast and easy in-line maintenance, in less than 15 minutes. Features and benefits. Qualified by EDF, the CLAMA easy maintenance check valve was developed to suit principal primary circuit requirements. DESIGN FEATURES: • One-piece forged body for more safety and... [See More]
- Connection Description: Socket Weld; Socket weld
- Agency: ASME
- Valve Size: 0.25 to 2.00
from Danfoss A/S
NRV and NRVH can be used in liquid, suction and hot gas lines in refrigeration and air conditioning plants with fluorinated refrigerants. NRV and NRVH can be supplied with flare and solder connections. They are also available with oversize solder connections providing flexibility in the use of check... [See More]
- Connection Description: Socket Weld
- Valve Size: 0.88 to 1.62
- Material Of Construction: Copper
- Maximum Pressure: 667.17
from U.S. Plastic Corporation
Hayward true check ball check valves with viton seals, NSF listed material and 150 PSI at 70 degrees F., prevent reversal of flow in piping systems. They are ideal where backflow could potentially cause damage to pumps, filters, or process equipment. Line pressure unseats the solid plastic ball to... [See More]
- Connection Description: Threaded; Union; Socket Weld
- Material Of Construction: CPVC
- Valve Type: BallDisk
- Valve Size: 0.50
from Velan, Inc.
Cast steel gate, globe and check valves with industry-leading emissions, shutoff and repairability performance. Features and benefits. All basic design features of Velan small forged steel check valves are adapted to special service conditions at cryogenic temperatures. Available in piston bolted... [See More]
- Connection Description: BoltFlange; Socket Weld; Socket weld, Flanged
- Agency: ASME
- Valve Size: 0.25 to 2.00
from Danfoss A/S
BCV check valves are installed in the liquid line of heat pump air conditioner to prevent counter flow at change over cycles from heating to cooling or vice versa. For prevention of reverse flow of high pressure gas when compressors stops. For use with Fluorinated Refrigerants, air or oil. BCV can... [See More]
- Connection Description: Socket Weld
- Valve Size: 0.26 to 0.63
- Material Of Construction: Copper
- Maximum Pressure: 601.91
from U.S. Plastic Corporation
Hayward true check ball check valves with FPM seals, NSF listed material and 150 PSI at 70 F., prevent reversal of flow in piping systems. They are ideal where backflow could potentially cause damage to pumps, filters, or process equipment. Line pressure unseats the solid plastic ball to open the... [See More]
- Connection Description: Threaded; Union; Socket Weld
- Material Of Construction: PVC
- Valve Type: BallDisk
- Valve Size: 0.50
from Velan, Inc.
Forged, one-piece inclined globe and check valves for high pressure applications. Features and benefits. • Solid CoCr alloy disc, fully guided for fast and full seating, even without spring. • High Cv. • Self-draining waterways. [See More]
- Connection Description: Threaded; Butt Weld; Socket Weld; Threaded, Socket weld, Butt weld
- Media: Water
- Valve Size: 0.50 to 4.00
- Agency: ASME
from Danfoss A/S
CHV-X SS stainless steel check valves are available in angleway versions. The valves are designed to open at very low differential pressures, allow favourable flow conditions and are easy to disassemble for inspection and service. The valve cone has a built-in flexibility to ensure a precise and... [See More]
- Connection Description: Socket Weld
- Valve Size: 0.59 to 1.57
- Material Of Construction: Copper
- Maximum Pressure: 754.20
from U.S. Plastic Corporation
Valves are very easy to maintain by allowing for easy removal from a piping system without breaking down the piping connections. Just unscrew the assembly nuts and lift the valve body out of the line. Valves prevent reversal of flow in piping systems. They are ideal where backflow could potentially... [See More]
- Connection Description: Union; Socket Weld
- Valve Size: 0.50
- Material Of Construction: PVC
from Velan, Inc.
A complete range of gate, globe and check valves for all of your high pressure and high temperature applications, proven over years of service in conventional thermal and nuclear power plants as well as other HP steam services around the world. Also preferred in high pressure, high temperature... [See More]
- Connection Description: Butt Weld; Socket Weld; Socket weld, Butt weld
- Agency: ASME
- Valve Size: 2.00 to 14.00
from U.S. Plastic Corporation
Not spring loaded but the design insures free movement of the ball. Ball supported by a system of guide ribs to give full flow with minimum turbulence and chatter. Union connections for easy access to valve components. Requires only inches of head pressure to seal and open. All plastic construction... [See More]
- Connection Description: Threaded; Union; Socket Weld
- Material Of Construction: CPVC
- Valve Type: BallDisk
- Valve Size: 0.50
from Velan, Inc.
A complete range of gate, globe and check valves for all of your high pressure and high temperature applications, proven over years of service in conventional thermal and nuclear power plants as well as other HP steam services around the world. Also preferred in high pressure, high temperature... [See More]
- Connection Description: Butt Weld; Socket Weld; Socket weld, Butt weld
- Valve Size: 2.00 to 24.00
- Valve Type: Swing
- Agency: ASME
from U.S. Plastic Corporation
Prevent reversal of flow. Similar in function to a ball check valve. Minimum of 2 lb. of positive back pressure seats the disc o-ring onto a precision machined seat. Hex cap makes easy clean out. 150 PSI at 70F. Available in CPVC, contact us for a quote. [See More]
- Connection Description: Socket Weld
- Valve Size: 0.50
- Material Of Construction: PVC
from Velan, Inc.
A complete range of gate, globe and check valves for all of your high pressure and high temperature applications, proven over years of service in conventional thermal and nuclear power plants as well as other HP steam services around the world. Also preferred in high pressure, high temperature... [See More]
- Connection Description: Butt Weld; Socket Weld; Socket weld, Butt weld
- Agency: ASME
- Valve Size: 2.00 to 24.00
from U.S. Plastic Corporation
Flow-tested for minimum turbulence. Fully serviceable, replaceable components, uses standard o-ring seat. Safe-T-Blocked seal carrier - full rated pressure. Easily converted to foot valve. NSF Certified for potable water use. Low extractable PVC material. Sizes 1/2" - 2" pressure rated to 235 psi @... [See More]
- Connection Description: Threaded; Union; Socket Weld
- Material Of Construction: PVC
- Valve Type: BallDisk
- Valve Size: 0.50
from Velan, Inc.
A complete range of gate, globe and check valves for all of your high pressure and high temperature applications, proven over years of service in conventional thermal and nuclear power plants as well as other HP steam services around the world. Also preferred in high pressure, high temperature... [See More]
- Connection Description: Butt Weld; Socket Weld; Socket weld, Butt weld
- Agency: ASME
- Valve Size: 2.50 to 24.00
from U.S. Plastic Corporation
1/2" PVC Spring Check valves are used to prevent back-flow and siphoning. The 2 lb. SS spring maintains a positive seal even when no back pressure is present. Suggest applications: pool/spa, irrigation and commercial water systems. A 2 psi minimum flow pressure is required to open valve. They have a... [See More]
- Connection Description: Socket Weld
- Valve Size: 0.50
- Material Of Construction: PVC
from Velan, Inc.
API 603 corrosion-resistant stainless steel gate, globe and swing check valves. Features and benefits. • Wall thickness to ASME B16.34. • Precision, high quality investment castings. [See More]
- Connection Description: Threaded; Socket Weld; Socket weld, Threaded
- Agency: ASME
- Valve Size: 0.50 to 2.00