Pressure Regulating Valves

Sporlan Crankcase Pressure Regulating Valves are designed to prevent overloading of the compressor motor by limiting the crankcase pressure during and after a defrost cycle or after a normal shutdown period. When properly installed in the suction line, these valves automatically throttle the vapor flow from the evaporator until the compressor can handle the load.
Number Title Date Pages
Bulletin 90-10 Crankcase Pressure Regulating Valves – For Compressor Overload Protection July 2012 8
Bulletin 90-11 Installation & Service Instructions – Crankcase Pressure Regulating Valves CRO-4, CRO-6, CROT-6, CRO-10, & CROT-10 July 2003 2
Bulletin 90-20 Evaporator Pressure Regulating Valves for Evaporator Temperature Controls May 2007 16
Bulletin 90-20-2 Evaporator Pressure Regulating Valves January 1996 8
Bulletin 90-21 Evaporator Pressure Regulating Valves Installation & Service Instructions June 2012 4
Bulletin 90-21-1 Evaporator Pressure Regulating Valves Installation and Service Instructions February 2008 4
Bulletin 90-21-2 Evaporator Pressure Regulating Valves Installation and Service Instructions February 1999 4
Bulletin 90-30 Head Pressure Control Valves For High and Low Ambient Stability July 2012 12
Bulletin 90-30-1 Head Pressure Control Charging Recommendations – ORI, ORD, OROA and LAC July 2012 8
Bulletin 90-31 Head Pressure Control Valves – OROA-5, ORI-6-65/225H, ORI-10-65/22H, ORD-4 November 2011 8
Bulletin 90-40 Discharge Bypass Valves for System Capacity Control March 2011 18
Bulletin 90-41 Installation and Service Instructions – Discharge Bypass Valves ADRI(E)-11/4, ADRS(E)-2, DRS(E)-2, ADRP(E)-3, DRP(E)-3, ADRH(E)-6, DRH(E)-6 August 2003 4
Bulletin 90-41-1 Installation and Service Instructions – Discharge Bypass Valves (S)HGB(E)-8 and SHGB(E)-15 May 2004 4
Bulletin 90-50 Defrost Differential Pressure Regulating Valves for Supermarket Systems February 2013 8
Bulletin 90-51 Pressure Regulating Valves Defrost Differential Installation and Service Instructions (O)LDR-16, (O)LDR-20, DDR-20 Obsolete: (O)LDR-15, XTM-1, XTM-5, XTO-1, -4 (Included for part’s breakdown) July 2012 12
Form 90-134 Supermarket Subcooling June 1998 6
Form 90-198 Understanding The Fundamentals Of Head Pressure Control May 2004 8
SD-036 Crankcase Pressure Regulating Valves – Installation & Service Instructions CRO-4, CRO-6, CROT-6, CRO-10, & CROT-10 March 2010 2
SD-057 Installation & Service Instructions – Discharge Bypass Valves ADRI(E)-11/4, ADRS(E)-2, DRS(E)-2, ADRP(E)-3, DRP(E)-3, ADRH(E)-6, DRH(E)-6 August 2003 4
SD-068 Installation & Service Instructions – Head Pressure Control Valves OROA-5, ORI-6-65/225H, ORI-10-65/225-H, ORD-4 May 2016 4
SD-073 Evaporator Pressure Regulating Valves Installation & Service Instructions ORIT-6 & ORIT-10 October 2010 2
SD-126 Evaporator Pressure Regulating Valves Installation & Service Instructions (S)ORIT-12 (S)ORIT-15 (S)ORIT-20 August 2002 4
SD-134 Installation & Service Instructions – Head Pressure Control Valves LAC-4 and LAC-4-DS 2
SD-197 Installation and Service Instructions – Discharge Bypass Valves Pilot Operated -(S)HGB(E)-8 and SHGB(E)-15 July 2011 4
SD-248 Capacity Conversion Kit for SORIT-PI BODY December 2004 2
SD-276 Instructions for replacing internal parts on the (S)ORIT-PI Valve February 2005 2
SD-277 Instructions for upsizing/downsizing ports on the (S)ORIT-PI Valves July 2004 2
SD-323 Crankcase Pressure Regulating Valves – Installation & Service Instructions CRO-4, CRO-6, CROT-6, CRO-10, & CROT-10 April 2010 2