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Swagelok PRS4, User Manual

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PRS4 and PRS8 Pressure-Reducing Regulator 
User Manual 

 

 

 

 

   

 

 

 

 

 
 

Read the complete manual before installing and using the regulator. 

Summary of Contents for PRS4

Page 1: ...PRS4 and PRS8 Pressure Reducing Regulator User Manual Read the complete manual before installing and using the regulator...

Page 2: ...dia should be free of excessive moisture to prevent icing at high flow Always wear the appropriate protective clothing including safety glasses gloves etc if required Follow the applicable safety and...

Page 3: ...Operation 6 Points of Attention Before Operation 6 Adjusting the Set Pressure 6 Maintenance 7 Required Tools for Maintenance 7 Points of Attention Before Removal from the System 8 Removal from the Sys...

Page 4: ...oduct failure Standard Features Threaded construction Stainless steel as standard Fully serviceable Diaphragm sensing Bottom mounting Additional Options The regulator is available with the following o...

Page 5: ...s materials of construction and the system media Installation Verify that the regulator its connections and any accessories are undamaged Verify that the regulator and any accessories are suitable for...

Page 6: ...sure may result in a fall of the outlet pressure This is usually referred to as inlet dependency or Supply Pressure Effect SPE This phenomenon does not indicate a problem with the regulator Adjusting...

Page 7: ...ng or normal operation Swagelok recommends having maintenance kits readily available on site The need for maintenance kits is particularly important during the commissioning phase of a system installa...

Page 8: ...or toxic If required take the necessary safety precautions to ensure a safe workspace and your personal safety CAUTION The product can be hot or cold depending on the environmental temperature and the...

Page 9: ...ide C1 12 Washer C1 13 Hex nut C1 3 7 5 14 Clamp ring C1 15 Set spring C1 C4 16 Spring guide C1 Lubricate central recess 17 Ball C1 Lubricate 18 Spring housing N A 37 50 Lubricate threads 19 C ring D1...

Page 10: ...10 PRS4 Series Exploded View Fig 1...

Page 11: ...11 PRS4 Series Section View Fig 2...

Page 12: ...12 PRS8 Series Exploded View Fig 3...

Page 13: ...13 PRS8 Series Section View Fig 4...

Page 14: ...e 11 6a PRS4 series Remove the seat retainer 8 using the seat retainer insertion tool Remove the seat 7 seat O ring 6 poppet 5 and poppet spring 3 from the body 1 6b PRS8 series Remove the seat retain...

Page 15: ...guide 11 12 Lightly lubricate the spring housing threads 18 and screw it onto the body 1 Torque to 37 lbf ft 50 N m PRS8 Series 1 Secure the body 1 in a vise 2 Fit the poppet O ring 4 onto the poppet...

Page 16: ...ly 14 5 psig 1 bar on the regulator and close the downstream shutoff valve 4 Monitor the outlet pressure An increase in pressure over time indicates a seat leak 5 Repeat the procedure with the highest...

Page 17: ...er than the desired set pressure The outlet pressure rises too much when going from a dynamic to a static situation There is too much flow in the dynamic situation A larger regulator or parallel regul...

Page 18: ...18...

Page 19: ...19...

Page 20: ...e Swagelok Limited Lifetime Warranty For a copy visit swagelok com or contact your authorized Swagelok representative Swagelok Snoop TM Swagelok Company Loctite TM Henkel Corp Krytox TM The Chemours C...

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