Circle Valve Technologies Inc.
1533 Gehman Road
Harleysville, PA 19438

Toll Free:800-645-6733
Phone: 267-933-6300
Fax: 267-933-6305
Email: [email protected]
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Features
  • Popoff or inline valves
  • Adjustable crack pressure
  • Zero leakage
  • Accurate set pressure
  • Tamper-proof adjustment
  • 100% seat leakage tested
  • PED certifications and CE marking available for most models
Circle Seal Relief Valve 500 Series Popoff
Unit of Measure
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Item #

Variation

Body Material

Seal Material

Valve Size

End Connection

Cracking Pressure

Operating Temperature

559B-4M-2.5 N/A Popoff N/A Brass N/A Buna N N/A 1/2 in N/A Pipe Thread Male N/A 2.5 psig N/A -65 to 275 ºF
559B-4M-20 N/A Popoff N/A Brass N/A Buna N N/A 1/2 in N/A Pipe Thread Male N/A 20 psig N/A -65 to 275 ºF
559B-4M-30 N/A Popoff N/A Brass N/A Buna N N/A 1/2 in N/A Pipe Thread Male N/A 30 psig N/A -65 to 275 ºF
559B-4M-4 N/A Popoff N/A Brass N/A Buna N N/A 1/2 in N/A Pipe Thread Male N/A 4 psig N/A -65 to 275 ºF
559B-4M-60 N/A Popoff N/A Brass N/A Buna N N/A 1/2 in N/A Pipe Thread Male N/A 60 psig N/A -65 to 275 ºF
559B-4M-8 N/A Popoff N/A Brass N/A Buna N N/A 1/2 in N/A Pipe Thread Male N/A 8 psig N/A -65 to 275 ºF
559B-4M-90 N/A Popoff N/A Brass N/A Buna N N/A 1/2 in N/A Pipe Thread Male N/A 90 psig N/A -65 to 275 ºF
559B-6M-2.5 N/A Popoff N/A Brass N/A Buna N N/A 3/4 in N/A Pipe Thread Male N/A 2.5 psig N/A -65 to 275 ºF
559B-6M-5 N/A Popoff N/A Brass N/A Buna N N/A 3/4 in N/A Pipe Thread Male N/A 5 psig N/A -65 to 275 ºF
559B-6MP-20 N/A Inline N/A Brass N/A Buna N N/A 3/4 in N/A Pipe Thread Male/Female N/A 20 psig N/A -65 to 275 ºF
559B-8M-10 N/A Popoff N/A Brass N/A Buna N N/A 1 in N/A Pipe Thread Male N/A 10 psig N/A -65 to 275 ºF
559B-8M-100 N/A Popoff N/A Brass N/A Buna N N/A 1 in N/A Pipe Thread Male N/A 100 psig N/A -65 to 275 ºF
559B-8M-12.5 N/A Popoff N/A Brass N/A Buna N N/A 1 in N/A Pipe Thread Male N/A 12.5 psig N/A -65 to 275 ºF
559B-8M-150 N/A Popoff N/A Brass N/A Buna N N/A 1 in N/A Pipe Thread Male N/A 150 psig N/A -65 to 275 ºF
559B-8M-20 N/A Popoff N/A Brass N/A Buna N N/A 1 in N/A Pipe Thread Male N/A 20 psig N/A -65 to 275 ºF
559B-8M-3 N/A Popoff N/A Brass N/A Buna N N/A 1 in N/A Pipe Thread Male N/A 3 psig N/A -65 to 275 ºF
559B-8M-4 N/A Popoff N/A Brass N/A Buna N N/A 1 in N/A Pipe Thread Male N/A 4 psig N/A -65 to 275 ºF
559B-8M-5 N/A Popoff N/A Brass N/A Buna N N/A 1 in N/A Pipe Thread Male N/A 5 psig N/A -65 to 275 ºF
559B-8M-5.1 N/A Popoff N/A Brass N/A Buna N N/A 1 in N/A Pipe Thread Male N/A 5.1 psig N/A -65 to 275 ºF
559B-8M-53 N/A Popoff N/A Brass N/A Buna N N/A 1 in N/A Pipe Thread Male N/A 53 psig N/A -65 to 275 ºF
559B-8MP-55 N/A Inline N/A Brass N/A Buna N N/A 1 in N/A Pipe Thread Male/Female N/A 55 psig N/A -65 to 275 ºF
559T1-1M-10 N/A Popoff N/A 316 Stainless Steel N/A Buna N N/A 1/8 in N/A Pipe Thread Male N/A 10 psig N/A -65 to 275 ºF
559T1-1M-20 N/A Popoff N/A 316 Stainless Steel N/A Buna N N/A 1/8 in N/A Pipe Thread Male N/A 20 psig N/A -65 to 275 ºF
559T1-1M-40 N/A Popoff N/A 316 Stainless Steel N/A Buna N N/A 1/8 in N/A Pipe Thread Male N/A 40 psig N/A -65 to 275 ºF
559T1-1M-46 N/A Popoff N/A 316 Stainless Steel N/A Buna N N/A 1/8 in N/A Pipe Thread Male N/A 46 psig N/A -65 to 275 ºF
Unit of Measure
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