A Tech-O-Seal relief valve can be furnished with any desired pressure setting up to 6000 PSI. The table below is presented for your convenience in determining which orifice diameter is best suited for your particular system requirements.
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Item #

Pressure Range

Orifice Size

Body Material

Disc Material

Seat Material

6VR57-1 N/A 150 to 500 PSI N/A 0.438 in N/A Bronze MIL-B-24480 N/A Nylon N/A Stainless Steel (304)
6VR57-2 N/A 400 to 1,200 PSI N/A 0.438 in N/A Bronze MIL-B-24480 N/A Nylon N/A Stainless Steel (304)
6VR57-3 N/A 750 to 3,500 PSI N/A 0.313 in N/A Bronze MIL-B-24480 N/A Nylon N/A Stainless Steel (304)
6VR57-4 N/A 3,000 to 5,000 PSI N/A 0.218 in N/A Bronze MIL-B-24480 N/A Nylon N/A Stainless Steel (304)
6VR57-5 N/A 4,700 to 6,000 PSI N/A 0.156 in N/A Bronze MIL-B-24480 N/A Nylon N/A Stainless Steel (304)
6VR57-6 N/A 75 to 300 PSI N/A 0.438 in N/A Bronze MIL-B-24480 N/A Nylon N/A Stainless Steel (304)
6VR57-7 N/A 30 to 125 PSI N/A 0.438 in N/A Bronze MIL-B-24480 N/A Nylon N/A Stainless Steel (304)
6VR57-8 N/A 10 to 50 PSI N/A 0.438 in N/A Bronze MIL-B-24480 N/A Nylon N/A Stainless Steel (304)
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