Diaphragm operated Solenoid/Strainer combo units.
442P & 443P are brass construction.
P442 & P443 are celcon plastic construction.

Used for controlling the flow of water, air, oil and various other (except hazardous) chemicals • Temperatures to 200 Deg. F. maximum • Standard with molded waterproof coil • Mount in any position except with the coil under the valve • Electrical junction box • Stainless steel seat • Buna seal • Pilot operation which are direct acting • Pressures to 125 PSI.