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- West Group Check Valve Catalogue
West Group Check Valve Catalogue
West Group Check Valve Catalogue
A check valve is a device that allows fluid or gas to flow in one direction only, preventing backflow. The West Group offers various types of check valves, including Floating Disc, Diaphragm, Duckbill, and Poppet types, specifically designed for medical and scientific applications.
Check valves operate based on the flow velocity of the fluid or gas, without external operation. The minimum pressure required to open the valve is known as the "cracking pressure," which varies depending on the valve's design.
These valves feature modular assembly for various combinations, single barb design for improved sealing, and multiple spring options. They are compatible with clean air and offer easy disassembly for research and development purposes.
Poppet valves are typically designed to be normally closed and use a spring to maintain closure. They provide quick flow interruption and positive sealing, independent of gravity or orientation.
Check valves are available with various materials such as Polypropylene, EPDM, and Viton seals. They can handle maximum inlet pressures up to 8.61 bar (125 psi) and operate within a temperature range of 5°C to 50°C. They comply with RoHS/REACH standards and FDA regulations.
The document details various check valves made from materials such as Borosilicate Glass, Grey Noryl, 302 Stainless Steel, Buna-N, and others. All products are RoHS/REACH compliant, ensuring they meet environmental and safety standards.
The valves are available in various configurations, including Grey Noryl bodied valves with EPDM seals and Stainless Steel balls, and Polysulfone bodied valves with internal silicone discs. They are designed to have low cracking pressures, typically around 0.5 psi, to facilitate easy flow initiation.
These valves are suitable for use in disposable applications, offering features like positive sealing, corrosion resistance, and compliance with ISO 80369 - 7 standards.
The document describes the operation of floating disc and diaphragm check valves, which use flexible elastomer discs or formed membranes to control flow.
Several product codes are listed, each with specific technical data such as maximum inlet pressure, connection sizes, and flow rates.
- Max Inlet Pressure: Ranges from 1.03 bar (15 psi) to 21 bar (304 psi) depending on the valve model.
- Connections: Various connection types including ID tubes, Luer locks, and bond-in ports with sizes ranging from 2.4mm to 4.8mm.
- Mounting Style: All valves are designed for in-line mounting.
- Wetted Materials: Common materials include medical-grade acrylic, silicone, polypropylene, SAN, and MABS.
- Non-wetted Materials: Typically the same as wetted materials, ensuring consistency in material properties.
- Media/Ambient Temperature: Ranges from -29°C to 121°C (-20°F to 250°F).
- All valves meet USP Class VI standards and are RoHS/REACH compliant.
- Some models also comply with ISO 10993, California Prop 65, and FDA 21 CFR 181.32.
- Valves are designed for use with both vacuum and pressure systems, suitable for vapour, gas, and fluid systems.
- Flow rates vary, with some models offering rates as low as 0.15 LPM and others up to 7.08 LPM.
- Cracking pressures range from ≤ 0.087 psi to 2.9 psi, depending on the model.
- Filtration is recommended depending on the application to ensure optimal performance and longevity of the valves.
ISO 80369-7 is crucial for enhancing patient safety by minimizing misconnections in medical devices, particularly those using luer lock connections.
- Position independent
- Low opening pressure for immediate flow
- High flow rate relative to package size
- Corrosion and wear resistant
- Cost-effective
Duckbill valves are one-piece elastomeric components used as backflow prevention devices.
Umbrella valves use a diaphragm-shaped sealing disc to prevent backflow and allow forward flow at predetermined pressures.
The West Group offers a wide range of fittings, couplings, tubing, and check valves suitable for medical and scientific applications.
Catalog excerpts
Check Valves
Open the catalog to page 1
Index About Check Valves • A check valve is designed to allow the flow of either liquid or gas one way • Check valves are also known as non-return or one-way valves, and are often used as pressure relief valves. The basic design of a check valve inhibits backflow • As a specialist supplier of miniature components, West Group’s product portfolio includes a comprehensive range of check valve options. Depending upon the type of check valve chosen, the operation of the check valve differs from type to type • Our check valve types are extensive. These include Floating Disc, Diaphragm, Duckbill, and...
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Need a custom check valve? Our check valve range is extensive. The West Group offer custom check valve configuration, where you can build the valve specification that your application requires. For more information email us at [email protected] Example Product Code: E - C 5 8 - P G - 2 N B 1 G R - N 3 Check Valve Cartridge Cartridge Diameter 5/8" Valve Body Material PP30%GF (g) O-ring Material - Nitrile 60 sh (h) Cracking Pressure - 3 psi (a) Inlet Connector / Type - Push-In (b) Inlet Connector / Size - 6mm (d) Outlet Connector / Type - Barb (c) Inlet Connector / Colour - Blue (e) Outlet Connector...
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E-C58-PG-1ER1ER-N0.5 - Modular Polypropylene Red Bodied Check Valve, 1/4� Barb Input and Output, Nitrile Seals, Cracking Pressure 0.5 psi Actual Size Technical Data Max. Inlet Pressure: 5 bar (75 psi) Connections: Barb Fitting to suit 1/4� (6.4mm) OD tube Mounting Style: In-Line Wetted Materials: Glass Filled Polypropylene, Polypropylene, Buna-N, 302 Stainless Steel Non-wetted Materials: Glass Filled Polypropylene Media/Ambient Temperature: 5°C to 50°C (41°F to 122°F) Recommended Filtration: Depending on application RoHS/REACH Compliant: Yes Regulatory Information: FDA CFR21 Other Technical Data:...
Open the catalog to page 4
E-C58-PG-2ER2ER-N0.5 - Modular Polypropylene Red Bodied Check Valve, 1/4� Push-In Input and Output, Nitrile Seals, Cracking Pressure 0.5 psi Actual Size Technical Data Max. Inlet Pressure: 5 bar (75 psi) Connections: Push-In Fitting to suit 1/4� (6.4mm) OD tube Mounting Style: In-Line Wetted Materials: Glass Filled Polypropylene, Polypropylene, Buna-N, 302 Stainless Steel Non-wetted Materials: Glass Filled Polypropylene Media/Ambient Temperature: 5°C to 50°C (41°F to 122°F) Recommended Filtration: Depending on application RoHS/REACH Compliant: Yes Regulatory Information: FDA CFR21 Other Technical...
Open the catalog to page 5
E-C58-PG-3CR3CR-N0.5 - Modular Polypropylene Red Check Valve, G1/8� Female Input and Output, Nitrile Seals, Cracking Pressure 0.5 psi Actual Size Technical Data E-CC58-PP-N0.5 - Polypropylene Cartridge for Modular Check Valve, Nitrile Seals, Cracking Pressure 0.5 psi Actual Size Technical Data Max. Inlet Pressure: 5 bar (75 psi) Connections: G1/8� Female Thread Mounting Style: In-Line Wetted Materials: Glass Filled Polypropylene, Polypropylene, Buna-N, 302 Stainless Steel Non-wetted Materials: Glass Filled Polypropylene Media/Ambient Temperature: 5°C to 50°C (41°F to 122°F) Recommended Filtration:...
Open the catalog to page 6
What is a Poppet/Ball? It is important to note that the poppet style check valve is usually designed to be normally closed. Poppet type valves generally utilise a spring to force shut the orifice by holding a component against a seal to replicate the backflow pressure. Spherical shapes like ball bearings with smooth surfaces, which seal against an O-ring seal, or poppets, which generally incorporate an O-ring seal and seal against a smooth face. When the forward pressure overcomes the spring force the valve opens. At this point the term cracking pressure is given to this action. An advantage...
Open the catalog to page 7
Poppets - Plastic E-C-180089 - Polypropylene Bodied Check Valve, EPDM Seal, 3.2mm (1/8�) ID Tube, Cracking Pressure 0.5 psi E-C-180085 - Polypropylene Bodied Check Valve, EPDM Seal, 6.4mm (1/4�) ID Tube, Cracking Pressure 0.5 psi Technical Data Technical Data Max. Inlet Pressure: 8.61 bar (125 psi) Connections: 3.2mm (1/8�) ID Tube Mounting Style: In-Line Wetted Materials: Polypropylene, EPDM, 316 & 302 Stainless Steel Non-wetted Materials: Polypropylene Recommended Filtration: Depending on application RoHS/REACH Compliant: Yes Other Technical Data: A miniature In-Line Polypropylene bodied check...
Open the catalog to page 8
Poppets - Plastic E-C-180061 - Kynar® Bodied Check Valve, EPDM Seal, 3.2mm (1/8�) ID Tube, Cracking Pressure 0.33 psi E-C-180053 - Kynar® Bodied Check Valve, EPDM Seal, 6.4mm (1/4�) ID Tube, Cracking Pressure 0.33 psi Technical Data Technical Data Max. Inlet Pressure: 8.61 bar (125 psi) Connections: 3.2mm (1/8�) ID Tube Mounting Style: In-Line Wetted Materials: Kynar®, Viton, 316 & 302 Stainless Steel Non-wetted Materials: Kynar® Recommended Filtration: Depending on application RoHS/REACH Compliant: Yes Other Technical Data: A miniature In-Line black PVDF (Kynar®) bodied check valve with an EPDM...
Open the catalog to page 9
Poppets - Plastic E-C-190044 - Clear Gamma Grade Polypropylene Bodied Check Valve, Silicone Stem, Luer Syringe Port to 6.4mm (1/4�) ID Tube E-C-180109 - Plastic Bodied Check Valve, Buna-N Seal, 4mm OD Push-In to M5 Male Thread, Cracking Pressure 7 psi Technical Data Technical Data Max. Inlet Pressure: 2.07 bar (30 psi) Connections: Luer Syringe Port to 6.4mm (1/4�) ID Tube Mounting Style: In-Line Wetted Materials: Polypropylene, Silicone, Recommended Filtration: Depending on application Regulatory Information: Meets Requirements for USP Class VI Cleanroom Manufactured: Class 7 cleanroom RoHS/REACH...
Open the catalog to page 10
Poppets - Plastic E-C-180114 - Technopolymer Bodied Check Valve, Buna-N Seal, 4mm OD Push-In, Cracking Pressure 7 psi E-C-180107 - Technopolymer Bodied Check Valve, Buna-N Seal, M5 Male Thread to 4mm OD Push-In, Cracking Pressure 7 psi Technical Data Technical Data Max. Inlet Pressure: 12 bar (174 psi) Connections: 4mm OD Push-In Fitting Mounting Style: In-Line Wetted Materials: Technopolymer, Nickel Plated Brass, Buna-N, Stainless Steel Non-wetted Materials: Technopolymer, Nickel Plated Brass Media Temperature: -20°C to 60°C (-4°F to 140°F) Recommended Filtration: Depending on application RoHS/REACH...
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