REFRIGERANT PRESSURE REGULATORS

The AFR-3 Automatic Flow Regulator provides for external adjustment of the flow rate. Parker’s AFR-3 is a liquid flow control device for overfeed or recirculated systems. Unlike pressure regulators or expansion valves the AFR directly controls the flow of refrigerant and maintains a constant flow rate of liquid to the evaporator. This precise and direct control provides increased operational efficiency. The AFR also serves as a check valve to prevent back flow into the liquid line from the evaporator during pressure reversals such as occur during hot gas defrost. Markets: • Industrial Refrigeration • Commercial Refrigeration Features and Benefits: • External Adjustment • Easy Setting Scale • Eliminates System Balancing • Integral Check Valve • “Frost Free” Neck • Design Pressure (MRP): 27.6 bar (400 psig) Application: • Used as a Liquid Control Device for Ammonia Overfeed Systems MAXIMUM RATED PRESSURE (BAR) [...]

The FloCon (S)PORT/ (S)PORTII commercial evaporator pressure regulators provide tight control in a variety of applications. The 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) [...]

The A2B products are compact pressure regulators that maintain upstream or downstream despite fluctuations in load. Parker’s A2 series of compact pressure regulators help reduce system cost and complexity by utilizing a compact housing and direct operation. These valves are ideal for applications where a larger pilot operating valve is too costly or too large. The regulators can be used with ammonia and certain other refrigerants, oil, and other approved fluids. The regulators are ideal for use in systems where a small inlet or outlet pressure regulator is needed and can also be used as a remote pilot for larger control valves that are located in difficult to service areas. Market: • Industrial Refrigeration • Commercial Refrigeration Features and Benefits: • Compact Direct Diaphragm Operated • Design Pressure (MRP): 27.6 bar (400 PSIG) • Furnished with Flanged Connections: FPT, SW, WN or ODS [...]

The A8 ductile iron-bodied regulators, with brazed copper couplings, maintain a constant pressure at a control point regardless of fluctuations in load, ambient conditions, or alternate diversions for flow. The A8 has a unique modular design that allows the commercial pressure 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 created, while pilot adaptors can be changed out to add features or even change functions. Thus, retrofitting for additional evaporator capacity, heat reclaim, or hold back for hot gas defrost is simple and requires no pipe line revisions under most circumstances. These valves will modulate to maintain a pressure as set for in the field, in spite of fluctuations in load, changes in ambient, changes [...]

The A9 ductile, iron bodied, pilot operated regulators with brazed copper couplings are used to modulate the flow of refrigerant gas to maintain a nearly constant outlet pressure at the sensing point. CONDENSERS HEAT EXCHANGERS COMPRESSORS ICE CONTROLLERS SPECIAL REFRIG VESSELS / VALVES COMMERCIAL REFRIGERATION Refrigerant Pressure Regulators Commercial Pressure Regulator - Flo-Con A9 The A9 ductile, iron bodied, pilot operated regulators with brazed copper couplings are used to modulate the flow of refrigerant gas to maintain a nearly constant outlet pressure at the sensing point. The A9 has a unique design allows the commercial pressure regulator to be soldered into the line without disassembly, yet allows disassembly of the valve for cleaning and maintenance without removing the regulator from line. This regulator is normally furnished as A9E externally equalized. The pressure being controlled is that pressure at the external equalizer connection. [...]