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Dafu Fluid Control Equipment (Chongqing) Co., Ltd
Sigma Fusible Shutdown Valve
NegotiableUpdate on 05/06
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Overview
The Sigma melting shut-off valve 15RS series is a temperature triggered, two/three position, cut-off and pressure relief composite safety control valve group. At normal temperature, the valve maintains the control circuit in a conductive/closed state to maintain the safe working pressure of the system. When a fire or high temperature occurs on site and reaches the melting point of the melting alloy, the melting element will melt instantly, and the valve will automatically operate: cutting off the upstream pressure+quickly releasing pressure. $r $n can trigger emergency shutdown (ESD), close safety valves, cut off fuel sources, and ensure system fire safety through this melting safety device, which is electrically free, passive, and fully automatic.
Product Details
Sigma Fusible Shutdown ValveThe 15RS series is a temperature triggered, two/three position, cut-off and pressure relief composite safety control valve group.
At normal temperature,Sigma Fusible Shutdown ValveKeep the control circuit conductive/Shut down the system to maintain safe working pressure.
When a fire or high temperature occurs on site and reaches the melting point of the melting alloy, the melting element will melt instantly, and the valve will automatically operate to cut off the upstream pressure +Quickly release pressure.
Through this melting safety device, emergency stop can be triggered automatically without electricity, without power, and without electricity（ESD）， Close the safety valve, cut off the fuel source, and ensure the fire safety of the system.
The melting element adopts low melting point eutectic alloy, and the sealing adopts fluororubber/Teflon, high temperature resistance, long lifespan, precise and reliable action.
Technical Specifications
1. Flow control form:Normally open type/Normally closed type
2. Control function:Two position two-way (pressure relief only), three position three-way (cut-off)+Relieve pressure)
3. Rated pressure of valve body (control interface):maximum 250～10000 PSI（17.24～690 bar）
4. Sealing material:Fluororubber（Viton）、 TFE/Teflon
5. Valve body connection size:1/4-18, 1/2-14 internal/external thread NPT (air source/valve/exhaust port)
6. Metal component material:316 stainless steel, 17-4PH stainless steel
7. Installation method:On site installation, pipeline installation, panel installation
8. Applicable working conditions:Standard operating conditionsH ₂ S sulfur resistant working condition, polar low temperature working condition (-55 ℃)
9. Flow coefficient Cv:0.50~3.00 (optional by model)
10. Weight:1.0~10.0 Lbs (optional by model)
11. Working temperature:-65°F ～ +250°F（-53.9℃ ～ +121℃）
