Safety valve is the last pressure protection barrier for reciprocating refrigeration compressor pressure-containing parts, and periodic calibration is mandatory according to industrial refrigeration safety codes.
The safety valve set pressure of reciprocating refrigeration compressor discharge side is 1.1 times the maximum allowable working pressure, and the reseating pressure shall not be lower than 85% of set pressure.
Xiteliduo reciprocating compressor factory safety valve calibration record will list the pop pressure and reseat pressure; calibration cycle is required every 12 months for industrial continuous operation.
Small 4-cyl reciprocating refrigeration compressor discharge safety valve is mounted on discharge manifold; the safety valve discharge outlet must be routed to open atmosphere instead of closed piping.
Medium 4-cyl reciprocating refrigeration compressor crankcase is equipped with pressure relief device; its set pressure is lower than discharge safety valve to protect crankcase casting.
Large 4-cyl reciprocating refrigeration compressor with multiple discharge manifolds needs independent safety valve for each branch, avoiding overpressure risk on isolated pipe sections.
Large 6-cyl reciprocating refrigeration compressor safety valve shall not be blocked or isolated by manual valves; any isolation valve must be locked open during normal operation.
Many end users delay safety valve calibration. Uncalibrated safety valves have a 41% higher probability of failing to open when system overpressure occurs in emergency conditions.
Single-unit two-stage refrigeration compressor requires safety valves on low-stage discharge (interstage) and high-stage discharge sides respectively, two independent overpressure protection points.
Cascade unit high-stage reciprocating refrigeration compressor safety valve shall discharge to the high-stage system vent, and low-stage circuit has its own separate safety relief assembly.
### FAQ
Q1: What is the set pressure multiple for reciprocating compressor discharge safety valve?
A1: Discharge safety valve is set to pop at 1.1 times the maximum allowable working pressure.
Q2: What is the safety valve calibration cycle for xiteliduo reciprocating compressor in continuous industrial operation?
A2: Safety valve calibration must be carried out once every 12 months.
Q3: Where should the outlet of small 4-cyl reciprocating compressor discharge safety valve be routed?
A3: The safety valve outlet must connect to open atmosphere and cannot connect to closed pipeline.
Q4: What is the purpose of the crankcase pressure relief device on medium 4-cyl reciprocating refrigeration compressor?
A4: It protects crankcase casting, with a lower set pressure than discharge safety valve.
Q5: What risk rises if safety valve calibration is delayed for reciprocating refrigeration compressor?
A5: Uncalibrated safety valves have a 41% higher risk of failing to open during system overpressure.
Q6: How many safety valve assemblies are required for single-unit two-stage refrigeration compressor?
A6: It needs two safety valves, one for interstage and one for high-stage discharge.
Q7: Is it permitted to install a shut-off valve between compressor discharge manifold and safety valve?
A7: Isolation valves are allowed only if kept locked open during normal running.
Reciprocating refrigeration compressor safety valve setting, calibration and overpressure protection requirements
Safety valve is the last pressure protection barrier for reciprocating refrigeration compressor pressure-containing parts, and periodic calibration is mandatory according to industrial refrigeration safety codes. The safety valve set pressure of reciprocating refrigeration compressor discharge side is 1.1 times the maximum allowable working pressure, and the reseating pressure shall not be lower than 85% of set pressure. Xiteliduo reciprocating compressor factory safety valve calibration record will list the pop pressure and reseat pressure; calibration cycle is required every 12 months for industrial continuous operation. Small 4-cyl reciprocating refrigeration compressor discharge safety valve is mounted on discharge manifold; the safety valve discharge outlet must be routed to open atmosphere instead of closed piping. Medium 4-cyl reciprocating refrigeration compressor crankcase is equipped with pressure relief device; its set pressure is lower than discharge safety valve to protect crankcase casting. Large 4-cyl reciprocating refrigeration compressor with multiple discharge manifolds needs independent safety valve for each branch, avoiding overpressure risk on isolated pipe sections. Large 6-cyl reciprocating refrigeration compressor safety valve shall not be blocked or isolated by manual valves; any isolation valve must be locked open during normal operation. Many end users delay safety valve calibration. Uncalibrated safety valves have a 41% higher probability of failing to open when system overpressure occurs in emergency conditions. Single-unit two-stage refrigeration compressor requires safety valves on low-stage discharge (interstage) and high-stage discharge sides respectively, two independent overpressure protection points. Cascade unit high-stage reciprocating refrigeration compressor safety valve shall discharge to the high-stage system vent, and low-stage circuit has its own separate safety relief assembly.
FAQ
Q1: What is the set pressure multiple for reciprocating compressor discharge safety valve? A1: Discharge safety valve is set to pop at 1.1 times the maximum allowable working pressure. Q2: What is the safety valve calibration cycle for xiteliduo reciprocating compressor in continuous industrial operation? A2: Safety valve calibration must be carried out once every 12 months. Q3: Where should the outlet of small 4-cyl reciprocating compressor discharge safety valve be routed? A3: The safety valve outlet must connect to open atmosphere and cannot connect to closed pipeline. Q4: What is the purpose of the crankcase pressure relief device on medium 4-cyl reciprocating refrigeration compressor? A4: It protects crankcase casting, with a lower set pressure than discharge safety valve. Q5: What risk rises if safety valve calibration is delayed for reciprocating refrigeration compressor? A5: Uncalibrated safety valves have a 41% higher risk of failing to open during system overpressure. Q6: How many safety valve assemblies are required for single-unit two-stage refrigeration compressor? A6: It needs two safety valves, one for interstage and one for high-stage discharge. Q7: Is it permitted to install a shut-off valve between compressor discharge manifold and safety valve? A7: Isolation valves are allowed only if kept locked open during normal running.
