Excess Flow Valves
Used in pipeline system to stop uncontrolled release of system media in the event of a downstream gas line rupture or disconnection,
thereby saving the media and guaranteeing the system safety.
Features
• Maximum operating pressure: 6000 psi (414 bar)
• Operating temperature: 400°F (204°C)
• End Connections: GENLOK and NPT
• Connection size: 1/8” to 1/2’’
• The flow through the bleed vent is less than 1% of the flow rate in the trip range
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Chino, CA 91710, USA
Materials
Operating Principles
The spring-loaded poppet remains in the open position during system operation. If an excess flow occurs downstream, i.e. a pressure drop, the poppet rapidly moves to the cutoff position to block all uncontrolled flow. When the pressure is balanced once again, the poppet will automatically revert to the original (open) position.
| Components | Material |
| 1 Valve Body | 316 SS |
| 2 Spring | 316 SS |
| 3 Poppet | 316 SS |
| 4 Valve Bushing | 316 SS |
| 5 Backup ring | PTFE |
| 6 O-ring | Viton® |
Pressure Temperature Ratings
The nominal pressure depends on the end connections
| Material | 316 SS |
| Temperature °F (°C) | Operating pressure psi (bar) |
| -10 (-23) ~ 100 (37) | 6000 (414) |
| 200 (93) | 5160 (356) |
| 250 (121) | 4910 (339) |
| 300 (148) | 4660 (321) |
| 400 (204) | 4280 (295) |
O-ring Materials
Viton O-rings are standard. For other O-ring materials, add the corresponding designator to the ordering number.
| Seal Materials | Reference Number | Temperature Rate °F（°C） |
| Fluororubber | -R | -10~370 (-23 ~ 190) |
| Buna-N | -B | -10~250 (-23 ~ 121) |
| Neoprene | -N | -40~250 (-40 ~ 121) |
| Kalrez® | -Q | -10~375 (-23 ~ 190) |
Dimensions
Metric
| Model | Connection Type | Pressure Range psi (bar) | Dimension (mm | ||
| Inlet | Outlet | A | F1/F2 | ||
| SS-EV12-TF6M | 6mm GENLOK | 6000 (413) | 61.7 | 11/16 | |
| SS- EV13-TF8M | 8mm GENLOK | 6000 (413) | 71.1 | 1 | |
| SS- EV13-TF10M | 10mm GENLOK | 6000 (413) | 64.8 | 11/16 | |
| SS-EV14-TF12M | 12mm GENLOK | 6000 (413) | 75.2 | 1 | |
English Units
| Model | Connection Type | Pressure Range psi (bar) | Dimension (in.) | ||
| Inlet | Outlet | A | F1/F2 | ||
| SS-EV12-TF4 | 1/4" GENLOK | 6000 (413) | 2.43 | 11/16 | |
| SS-EV12-FNT2 | 1/8" Female NPT | 6000 (413) | 1.87 | 11/16 | |
| SS-EV12-FNT4 | 1/4" Female NPT | 6000 (413) | 1.87 | 11/16 | |
| SS-EV12-NT2 | 1/8" Male NPT | 6000 (413) | 1.79 | 11/16 | |
| SS-EV12-NT4 | 1/4" Male NPT | 6000 (413) | 2.28 | 11/16 | |
| SS-EV12-VM4 | 1/4" FSR | 6000 (413) | 2.75 | 1 | |
| SS-EV13-TF6 | 3/8" GENLOK | 6000 (413) | 2.70 | 1 | |
| SS-EV13-FNT6 | 3/8" Female NPT | 5300 (365) | 2.12 | 11/16 | |
| SS-EV13-NT6 | 3/8" Male NPT | 6000 (413) | 2.36 | 1 | |
| SS-EV14-TF8 | 1/2" GENLOK | 6000 (413) | 2.97 | 1 | |
| SS-EV14-FNT8 | 1/2" Female NPT | 4900 (337) | 3.03 | 1-1/16 | |
| SS-EV14-NT8 | 1/2" Male NPT | 6000 (413) | 2.73 | 1 | |
| SS-EV14-VM8 | 1/2" FSR | 4300 (296) | 2.73 | 1 | |
Restrictions
WARNING: Cancer and Reproductive Harm For more information go to www.P65Warnings.ca.gov