Parker LAC head pressure control valves have a brass body with copper connections. These valves are nonadjustable. They perform the function of limiting flow of refrigerant from the condenser and at the same time regulate the flow of hot gas around the condenser to the receiver during low ambient conditions, so as to keep the refrigerant in the liquid line at proper pressure. Each valve is factory tested to ensure positive leak-free performance.

210 PSI
• 1/2" OD
  
  

  Parker LAC-5-210-1/2OD

Straight Through Electronic Regulator Valve #4 7/8" OD

Bi-Polar Stepper Motor

Tight Seating Piston Pesign

Serviceable Construction

Construction Brass & Copper

Actuator Design Provides Great Resolution

Parker CDST-4-7-20FT-S

Straight Through Electronic Regulator Valve #4 5/8" OD

Bi-Polar Stepper Motor

Tight Seating Piston Pesign

Serviceable Construction

Construction Brass & Copper

Actuator Design Provides Great Resolution



Parker CDST-4-5-20FT-S

Straight Through Electronic Regulator Valve #7 1-3/8" OD

Bi-Polar Stepper Motor

Tight Seating Piston Pesign

Serviceable Construction

Construction Brass & Copper

Actuator Design Provides Great Resolution

Parker CDST-7-11-20FT-S

The ORD valve is a pressure differential valve that responds to changes in the pressure difference across the valve, Figure 6 on the next page. The valve designation stands for Opens on Rise of Differential pressure. Therefore, the ORD is dependent on some other control valve or action for its operation. And in this respect, it is used with the ORI for head pressure control. As the ORI valve starts to throttle the flow of liquid refrigerant from the condenser, a pressure differential is created across the ORD. When the differential reaches setpoint, the ORD starts to open and bypasses hot gas to the liquid drain line. As the differential increases, the ORD opens further until its full stroke is reached at a differential of 10 psi above setpoint. Due to its function in the control of head pressure, the full stroke can be utilized in selecting the ORD. The standard pressure setting for the ORD is 20 psig. For systems where the pressure drop between the compressor and the receiver is higher than 14 psi, an ORD with a higher setting is available.

20 PSI

5/8" OD

Parker ORD-4-20

Sherwood Pressure Relief Valve

600 psi.

3/8" MPT x 1/2" Flare

Sherwood Valve 3015C-600

Parker LAC head pressure control valves have a brass body with copper connections. These valves are nonadjustable. They perform the function of limiting flow of refrigerant from the condenser and at the same time regulate the flow of hot gas around the condenser to the receiver during low ambient conditions, so as to keep the refrigerant in the liquid line at proper pressure. Each valve is factory tested to ensure positive leak-free performance.

• 210 PSI
• 1/2" OD

Parker LAC-4-210-1/2

Parker commercial pressure regulator (S)PORT/(S)PORTII valves are designed with stainless steel bonnet bolts, adjusting stems, and piston and plug assemblies. The result is a regulator designed to withstand the rigorous application environment a low side regulator must endure. Models are available in combinations of connection sizes, port sizes and features as designated by the model code. Unlike some competitive models of low side regulators that utilize high pressure discharge gas as a pilot source, they are piloted with upstream pressure. This eliminates the requirement for hot gas headers, isolation devices, piping, and the labor associated with the installation of other valves. Flare connections from high pressure pilot lines are also eliminated, minimizing sources for prospective leaks. The valves are an integrated assembly of (4) modules: 1) a body, which contains no moving parts, 2) a capacity cartridge, which contains both piston and modulating plug, and defines the port size and onto which the pilot solenoids providing the"S" (shut-off) or"B" (bypass) features are added as required, 4) the bonnet, containing the range spring and adjustment screw, which is set for the value of pressure which the valve is to maintain. The unique modular design allows the regulator to be soldered into the line without disassembly, yet provides full access for disassembly, cleaning and servicing from the top only. Interchangeable capacity cartridges facilitate flow revisions should an undersized or oversized condition be encountered, while pilot adapters can be changed out to add features or even change functions.

Retrofitting for additional evaporator capacity is simple and requires no pipe line revisions
• The piston and plug assembly can handle reduced flow conditions and controlling down to about 15% of the valve's maximum capacity
• 7/8" OD
• Designed entirely with corrosion resistant materials
• New cooler running coil and open frame coil housing
• New dual Voltage 208/240/60 Hz coil
• Conveniently located access fitting
• Pilot operated for close control at desired set-point
• Excellent regulation at light loads
• Interchangeable capacity cartridges
• Low pressure drop
• Few moving parts
• Long-life stainless steel diaphragms (no bellows to fail)
• Pilot electric shut-off
• All service from the top
• Sweat-in-place without disassembly
  
  

  Parker SPORT-07-07