Model I-A Relief Valve
 
Standard
Poco Pin Settings:
Relief valve for mud and slurry pumps from 500 PSI to 6,000 PSI

Features:
• 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.

Options:
Pins can be changed by one person in minutes and can be stored in a pin container at the valve.
• A proximity sensor can be installed to remotely monitor when the valve opens.
• Pin protector cage.
• A flush port can be used to clear lost circulation material for resetting.

Applications:
• Use instead of shear and spring valves where you need greater accuracy and reliability.
• Mud and slurry pump relief to
15,000 PSI.

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PSIG
500
750
1,000
1,500
2,000
2,500
3,000
3,500
3,800
4,000
4,500
5,000
5,500
6,000
BARG
35
52
69
103
138
172
207
241
262
276
310
345
379
414