Control Unit AR-RM40S for AR-503 AR North America diaphragm pump. (formerly Hypro 9910-RM40) 
RM40 Control unit for medium pressure diaphragm pumps with working pressure regulating valve, by-pass control lever and glycerine bath pressure gauge with colored dial. Suitable for AR 503, AR 30 and AR 50 pumps. 
SPECIFICATIONS
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