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RH series
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Catalog excerpts

RH series - 1

3-D Drawings ch Web Site Master Table of Contents Relief Valves (RH4 Series) 3-D Drawings 3-D Drawings Master Site of Contents Web Table Web Site

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RH series - 2

Series RH4 Relief Valves Introduction Parker RH4 Relief Valves are designed such that when the upstream pressure exceeds the closing force exerted by the spring, the lower stem opens, permitting flow through the valve. Flow through the valve increases proportionately to the increase in upstream pressure. Features Specifications ► Pressure settings are externally adjustable while the valve is in operation. Eight different spring ranges provide greater system sensitivity and enhanced performance. ► Captured molded seat design is blow-out and chip resistant. ► Manual Override option with...

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RH series - 3

Series RH4 Relief Valves ( ) Denotes dimensions in millimeters Model Shown: 4M4F-RH4A-VT-SS-MN-K2 Model Shown: 4A-RH4A-BNT-SS-K1 t For CPI™ and A-LOK®, dimensions are measured with nuts in the finger tight position. £ Tested in accordance with ISA S75.02. Gas flow will be choked when Pt - P2 / Pt = xT. Spring Kits Spring Kit Contains: Spring Coded label PTFE washers Locking wire / lead seal Installation Instructions Web Site Parker Hannifin Corporation Instrumentation Products Division Jacksonville, Alabama

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RH series - 4

Series RH4 Relief Valves How to Order The correct part number is easily derived from the following number sequence. The eight product characteristics required are coded as shown below. *Note: If the inlet and outlet ports are the same, eliminate the outlet port designator. – Outlet Port Valve Series Male NPT Female NPT A-LOK® Compression CPITM Compression Female BSP/ISO Male BSP/ISO A-LOK® Compression CPITM Compression A-LOK® Compression CPITM Compression Back-Up Rings Body Material V Fluorocarbon T PTFE SS Stainless (blank) Standard K1 50 - 350 psig Rubber Steel K2 350 - 750 psig MN Manual...

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RH series - 5

Series RH4 Relief Valves Materials of Construction Material ASTM A 479 Type 316 17-7 Stainless Steel 316 Stainless Steel ASTM A 479 Type 316 ASTM A 479 Type 316 *Fluorocarbon Rubber ASTM A 479 Type 316 ASTM A 479 Type 316 Zinc Coated Steel PTFE ASTM A 479 Type 316 PTFE *Fluorocarbon Rubber *Fluorocarbon Rubber ASTM A 182 Type F316 ASTM A 479 Type 316 Phenolic Re-seal Pressure (psig) Note: Valves which are not actuated for a period of time may initially crack at higher than set crack pressures. Note: To determine MPa, multiply bar by 0.1 Lubrication: Perfluorinated polyether. *Wetted Parts...

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RH series - 6

3-D Drawings ch Web Site Master Table of Contents Parker Hannifin Corporation Instrumentation Products Division 2651 Alabama Highway 21 North Jacksonville, AL 36265-9681 USA Phone: (256) 435-2130 Fax: (256) 435-7718 www.parker.com/ipdus Parker Hannifin plc Instrumentation Products Division Riverside Road Pottington Business Park Barnstaple, Devon EX31 1NP England Phone: +44 (0) 1271 313131 Fax: +44 (0) 1271 373636 Email: ipd@parker.com www.parker.com/ipd 3-D Drawings 3-D Drawings Master Site of Contents Web Table Web Site

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