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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

D559B-8M-60 N/A Popoff with deflector cap N/A Brass N/A Buna N N/A 1 in N/A Pipe Thread Male N/A 60 psig N/A -65 to 275 ºF
D559T1-1M-0.5 N/A Popoff with deflector cap N/A 316 Stainless Steel N/A Buna N N/A 1/8 in N/A Pipe Thread Male N/A 0.5 psig N/A -65 to 275 ºF
D559T1-1M-15 N/A Popoff with deflector cap N/A 316 Stainless Steel N/A Buna N N/A 1/8 in N/A Pipe Thread Male N/A 15 psig N/A -65 to 275 ºF
D559T1-1M-30 N/A Popoff with deflector cap N/A 316 Stainless Steel N/A Buna N N/A 1/8 in N/A Pipe Thread Male N/A 30 psig N/A -65 to 275 ºF
D559T1-1M-5 N/A Popoff with deflector cap N/A 316 Stainless Steel N/A Buna N N/A 1/8 in N/A Pipe Thread Male N/A 5 psig N/A -65 to 275 ºF
D559T1-1M-50 N/A Popoff with deflector cap N/A 316 Stainless Steel N/A Buna N N/A 1/8 in N/A Pipe Thread Male N/A 50 psig N/A -65 to 275 ºF
D559T1-1M-60 N/A Popoff with deflector cap N/A 316 Stainless Steel N/A Buna N N/A 1/8 in N/A Pipe Thread Male N/A 60 psig N/A -65 to 275 ºF
D559T1-1M-80 N/A Popoff with deflector cap N/A 316 Stainless Steel N/A Buna N N/A 1/8 in N/A Pipe Thread Male N/A 80 psig N/A -65 to 275 ºF
D559T1-2M-1 N/A Popoff with deflector cap N/A 316 Stainless Steel N/A Buna N N/A 1/4 in N/A Pipe Thread Male N/A 1 psig N/A -65 to 275 ºF
D559T1-2M-10 N/A Popoff with deflector cap N/A 316 Stainless Steel N/A Buna N N/A 1/4 in N/A Pipe Thread Male N/A 10 psig N/A -65 to 275 ºF
D559T1-2M-100 N/A Popoff with deflector cap N/A 316 Stainless Steel N/A Buna N N/A 1/4 in N/A Pipe Thread Male N/A 100 psig N/A -65 to 275 ºF
D559T1-2M-115 N/A Popoff with deflector cap N/A 316 Stainless Steel N/A Buna N N/A 1/4 in N/A Pipe Thread Male N/A 115 psig N/A -65 to 275 ºF
D559T1-2M-12 N/A Popoff with deflector cap N/A 316 Stainless Steel N/A Buna N N/A 1/4 in N/A Pipe Thread Male N/A 12 psig N/A -65 to 275 ºF
D559T1-2M-15 N/A Popoff with deflector cap N/A 316 Stainless Steel N/A Buna N N/A 1/4 in N/A Pipe Thread Male N/A 15 psig N/A -65 to 275 ºF
D559T1-2M-20 N/A Popoff with deflector cap N/A 316 Stainless Steel N/A Buna N N/A 1/4 in N/A Pipe Thread Male N/A 20 psig N/A -65 to 275 ºF
D559T1-2M-3 N/A Popoff with deflector cap N/A 316 Stainless Steel N/A Buna N N/A 1/4 in N/A Pipe Thread Male N/A 3 psig N/A -65 to 275 ºF
D559T1-2M-30 N/A Popoff with deflector cap N/A 316 Stainless Steel N/A Buna N N/A 1/4 in N/A Pipe Thread Male N/A 30 psig N/A -65 to 275 ºF
D559T1-2M-35 N/A Popoff with deflector cap N/A 316 Stainless Steel N/A Buna N N/A 1/4 in N/A Pipe Thread Male N/A 35 psig N/A -65 to 275 ºF
D559T1-2M-60 N/A Popoff with deflector cap N/A 316 Stainless Steel N/A Buna N N/A 1/4 in N/A Pipe Thread Male N/A 60 psig N/A -65 to 275 ºF
D559T1-2M-90 N/A Popoff with deflector cap N/A 316 Stainless Steel N/A Buna N N/A 1/4 in N/A Pipe Thread Male N/A 90 psig N/A -65 to 275 ºF
D559T1-6M-20 N/A Popoff with deflector cap N/A 316 Stainless Steel N/A Buna N N/A 3/4 in N/A Pipe Thread Male N/A 20 psig N/A -65 to 275 ºF
D559T1-6M-27 N/A Popoff with deflector cap N/A 316 Stainless Steel N/A Buna N N/A 3/4 in N/A Pipe Thread Male N/A 27 psig N/A -65 to 275 ºF
D559T1-6M-4 N/A Popoff with deflector cap N/A 316 Stainless Steel N/A Buna N N/A 3/4 in N/A Pipe Thread Male N/A 4 psig N/A -65 to 275 ºF
559B-4M-2.2 N/A Popoff N/A Brass N/A Buna N N/A 1/2 in N/A Pipe Thread Male N/A 2.2 psig N/A -65 to 275 ºF
559B-4M-2.3 N/A Popoff N/A Brass N/A Buna N N/A 1/2 in N/A Pipe Thread Male N/A 2.3 psig N/A -65 to 275 ºF
Unit of Measure
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