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Model I-A Relief Valve
• 2" and 3" FNPT – 602, 1002 and 1502 fittings.
• Settings from 500 PSI to 6,000 PSI with 13 set pressure pins
(see "Standard Poco Pin Settings" on right)
• Change settings by changing the pin. The set pressure is shown on the pin label. The 2" and 3" valves use the same interchangeable pins.
• Changeable stainless steel seat and piston are standard.
Advantages:
• No flow impingement on seat, seal or piston.
• Reliable settings. +/–5% accuracy of set pressure.
• Simple, dependable operation. One moving part.
• Our valve utilizes a proven design principle – Euler's Law.
• Reaches full open position in milliseconds at set pressure.
• Provides a bubble-tight seal with seat washout protection.
• Fatigue and pulsation are not factors that affect the set pressure
of the valve.
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