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Check Valves Series : VC31
- Index
- Features & Benefits
- Operating Parameters
- Material of Constructions
- Dimensions
- Ordering Information
Check Valve
Series : VC31
DAWSONS-TECH® Check Valve Series : VC31 is a very compact and robust in construction and designed for unidirectional flow control of fluids and gases for medium pressure (UPTO 6000 PSIG) used in Instrumentation systems.
Features / Benefits :
- Back stopped poppet design to minimum spring stress.
- Elastomeric seat provides leak tight seal.
- Provides large flow, minimum of chatter and fluctuation.
- Variable cracking pressure : 1/3, 1, 5, 10, 25, 50 and 100 PSIG.
- Suitable for Vacuum and medium-pressure Fluid/Gas applications.
- Available in Material SS316L.
- Heat code traceability to certified material test report.
- Every Valve is Pressure tested.
Product Range & Operating Parameters :
- Pressure Rating : UPTO 6000 PSIG (207 Bar) at CWP
- Temperature Rating : UPTO 198°C with Fluorocarbon ‘O’ Ring
- End Connections
- Fractional : 1/4″ to 1” Tube OD
- Metric : 6mm to 25mm
- Tube OD Pipe Thread : 1/4″ to 1” Male / Female BSP / BSPT / NPT
- Metal Gasket Face Seal : 1/4″ to 1”
- ‘O’ Ring Face Seal : 1/4″ to 1”
Applications :
- Gas
- Liquid
- Fluid handling.
Type Test Approvals :
The design of DAWSONS-TECH® Check Valve Series : VC31 has been tested for Hydrostatic Proof and Burst Test in accordance with MSS SP-99-2016a Clause 5.5 & 5.6.
Testing :
- Standard Test : Each Valve is pressure tested with Nitrogen at 1000 PSIG (69 Bar) for leakage at the seat and packing.
- Optional Hydrostatic Test : This test is performed with De-ionized water at 1.5 times the working pressure.
Certification :
The certificate to 3.1 acc. to EN10204 for Valve Body Material and pressure test will be provided on request.
Material of Construction :
| Sr. No. | Description | Material |
| 1 | Inlet Body | SS316 |
| 2 | ‘O’ Ring | Fluorocarbon |
| 3 | Poppet | SS316 |
| 4 | Spring | Stainless Steel |
| 5 | Outlet Body | SS316 |
| 6 | ‘O’ Ring | Fluorocarbon |
| End Connection | Flow Data | A (mm) | A/F (Inch) | Dawsons-Tech Part No. | ||
| Type | Size | Orifice (mm) | Cv | |||
| Male NPT | 1/4 | 4.7 | 0.75 | 55.4 | 3/4 | VC31-MM4N |
| 3/8 | 9.1 | 2.26 | 75.2 | 1 | VC31-MM6N | |
| 1/2 | 11.5 | 3.53. | 90.4 | 1-1/4 | VC31-MM8N | |
| 3/4 | 15.1 | 6.01 | 103.9 | 1-3/8 | VC31-MM12N | |
| 1 | 16.7 | 6.56 | 114.8 | 1-5/8 | VC31-MM16N | |
| Female NPT | 1/4 | 4.7 | 0.75 | 61.0 | 3/4 | VC31-FF4N |
| 3/8 | 9.1 | 2.26 | 77.0 | 1 | VC31-FF6N | |
| 1/2 | 11.5 | 3.53 | 90.4 | 1-1/4 | VC31-FF8N | |
| 3/4 | 15.1 | 6.01 | 103.9 | 1-3/8 | VC31-FF12N | |
| 1 | 16.7 | 6.56 | 122.9 | 1-5/8 | VC31-FF16N | |
Fractional Tube Fitting | 1/4 | 4.7 | 0.75 | 61.5 | 3/4 | VC31-TT4 |
| 3/8 | 7.1 | 2.09 | 83.1 | 1 | VC31-TT6 | |
| 1/2 | 10.7 | 3.53 | 103.6 | 1-1/4 | VC31-TT8 | |
| 3/4 | 15.1 | 6.01 | 110.2 | 1-3/8 | VC31-TT12 | |
| 1 | 16.7 | 6.56 | 117.6 | 1-5/8 | VC31-TT16 | |
Metric Tube Fitting | 6 mm | 4.7 | 0.75 | 61.7 | 3/4 | VC31-TT6M |
| 8 mm | 6.4 | 2.02 | 84.6 | 1 | VC31-TT8M | |
| 10 mm | 7.9 | 2.16 | 85.1 | 1 | VC31-TT10M | |
| 12 mm | 9.5 | 2.93 | 103.1 | 1-1/4 | VC31-TT12M | |
| 22 mm | 15.1 | 6.01 | 109.2 | 1-3/8 | VC31-TT22M | |
| 25 mm | 16.7 | 6.56 | 120.4 | 1-5/8 | VC31-TT25M | |
Dimensions are for reference only and are subject to change.