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V43/V243 Series valves technical specifications Specification Description Maximum water supply pressure 150 psig (1,034 kPa) V43 maximum head pressure 300 psig (2,068 kPa) V243 maximum head pressure 630 psig (4,344 kPa) Low-pressure refrigerants R-134A – 70 to 150 psig (482 to 1,034 kPa) V43 Medium-pressure refrigerants R-22, R-502, R404A – 160 to 260 psig (1,103 to 1,793 kPa) Head pressure range, opening points V243 High-pressure 200 to 400 psig (1,379 to 2,758 kPa) Low-pressure refrigerants 90 psig (621 kPa) V43 Medium-pressure refrigerants 180 psig (1,241 kPa) Factory settings 1 V243 High-pressure 200 psig (1,379 kPa) Maximum water supply temperature 160°F (71°C) Commercial Cast iron Valve body material Maritime Red brass Commercial Brass Internal parts material Maritime Bronze, MONEL Pilot MONEL Seat material Main valve Commercial – bronze Maritime – MONEL Seat disc material Buna N ™ Packing; bellows assembly Brass stem, stainless steel spring, synthetic rubber boot Pressure connection refrigerant side Noncorrosive 1/4 in. SAE external flare 1 You can adjust the factory opening setpoint for the valve. 239 Refrigeration Products Catalog