Stainless steel back-pressure regulator
1/4", 10 000 psig | BP-66 Circle Seal Controls

The BP-66 Series is the counterpart of the PR-57
pressure reducing series for systems that are higher
in pressure and low to moderate flows. This regulator
has piston sensing to provide relief at high pressures.
The Polyimide/stainless steel assembly provides good
shutoff in most applications. For economy purposes,
the cap assembly and knob are of aluminum
construction as in the PR-57 companion unit. Good
sensitivity and a selection of control ranges make this
regulator an excellent selection in many research and
pilot plant facilities.
Features & Specifications
• 316L stainless steel construction
• Adjustable pressure control ranges of 0–2,000 psig,
0–4,000 psig, 0–6,000 psig, 0–7,500 psig, and
0–10,000 psig
• Spring-loaded piston sensor
• Gas and liquid service
• Cv flow coefficient: 0.04
• Operating temperature of −40° F to +350° F
(−40° C to +176° C)
• ¼˝ FNPT connections standard