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PR-1 Series*

Adjustable Pressure Control Regulator

pressure regulators The PR-1 Series is a versatile specialty pressure reducing control regulator designed to ful ll a wide range of needs in instrumentation sample systems and other applications such as semiconductor processing gases. The many features of the PR-1 make it ideal for a wide range of applications controlling pressures at low to moderate ows in gas or liquid service. 316L material is used to facilitate welded connections. Stainless steel caps and adjusting screws prevent atmospheric corrosion and maintain appearance. Enhanced internal body surface nish of better than 25 Ra plus electropolishing allows easier cleaning and potentially less particle contamination in the ow stream.Six di erent seat materials, three alternate ori ce sizes and eight pressure control ranges with stainless diaphragms o er the user a wide spectrum of capabilities for pressure control with inlet pressures up to 6,000 psig and standard operating temperatures up to 500° F (260° C).
* Replaces the LPR and MR Series.

Features & Speci cations Options

• Gas or liquid service• 316L stainless steel, Inconel®, Te on®, and Tefzel® only in ow stream• Electropolished 316L body with better than 25 Ra diaphragm cavity surface nish• Stainless steel cap with stainless steel adjust-ing screw• Inlet pressures of up to 6,000 psi• Adjustable outlet pressure ranges of 0–6 psig, 0–10 psig, 0–25 psig, 0–50 psig, 0–100 psig, 0–250 psig, 0–500 psig, and 0–750 psig• Operating temperatures of −40° F to +500° F (−40° C to +260° C)• 20µ lters• Bubble-tight shuto under most conditions• Cv ow coe cient: 0.06 • Wetted materials of construction: Monel®, Hastelloy® and titanium• Diaphragm attached poppet• Special ttings• Diaphragm assist spring for vacuum purging• Larger Cv’s of 0.2 and 0.5, smaller Cv’s of 0.025• Panel mount (1â�„Ë� mounting hole)

Maximum Temperature &Operating Inlet Pressures

Seat MaterialMaximum Temperature*@Maximum Operating Inlet Pressure Tefzel®150° F (66° C)@3,600 psig (24.82 MPa)High density Te on®150° F (66° C)@3,600 psig (24.82 MPa)CF Te on®175° F (80° C)@3,600 psig (24.82 MPa)PCTFE (formerly Kel-F® 81)175° F (80° C)@6,000 psig (41.37 MPa)Polyimide500° F (260° C)@3,600 psig (24.82 MPa)Polyimide175° F (80° C)@6,000 psig (41.37 MPa)PEEK™500° F (260° C)@3,600 psig (24.82 MPa)PEEK™175° F (80° C)@6,000 psig (41.37 MPa) Circle Seal Controls 2301 Wardlow Circle • Corona, CA 92880Phone (951) 270-6200 • Fax (951) 270-6201www.circle-seal.com
* Temperatures in excess of 175° F (80° C) require the use of a metal knob or the tamper-proof option.