Parker’s New SPW Pulse Width Modulation Valves Control Refrigerant Flow in Direct Expansion HFC, HCFC and HFO Refrigeration Systems

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Based on measured evaporator superheat, modulating valves cycle on and off to achieve desired flow.

WASHINGTON, Mo. – January 22, 2018 – The Sporlan Division of Parker Hannifin Corporation, the global leader in motion and control technologies, today introduced its SPW pulse width modulation valves, models SPW-0 through -7. In accordance with measured evaporator superheat, the pulse width style valves cycle open and closed to precisely control refrigerant flow to the evaporator in direct expansion refrigeration systems using hydroflurocarbons (HFC), hydrochlorofluorocarbons (HCFC) and new low global warming potential (GWP) hydrofluoro-olefin (HFO) refrigerants, that are both non-flammable and non-toxic.

The SPW line of electric expansion valves offers eight port sizes to cover a wide range of evaporator loads up to 4.5 tons nominal capacity for R407A, R407F, R448A and R449A. The serviceable valve design allows the contractor to service and clean the inlet strainer and easily replace the port during a refrigerant retrofit. The valves’ robust design offers a 50 million-plus cycle life.

With an overriding mandate to uphold food quality, today’s supermarkets are driven to maintain case temperature. When connected to a compatible refrigeration controller with advanced algorithms, Parker’s SPW line of electric expansion valves maintains consistent superheat by precisely controlling refrigerant flow. The valves can be remotely monitored to apprise department managers of case temperature and status. In addition, they are easy to troubleshoot and close on power failure to avoid refrigerant migration when the system is offline.

“With the SPW electric expansion valves, efficient operation is achieved and start up time is minimized. No mechanical adjustments are needed to set superheat at the valves,” commented Bruce Choi, electric valve product manager. “This can save up to 80 hours of work per store.”

The SPW line of pulse width modulation valves will be on display at the 2018 AHR Expo in McCormick Place, Chicago, January 22-24 (Booth # 4936).

For more information about the entire SPW line, contact