Quality is everything! US Walker (WORK) imported refrigeration solenoid valve series for indirect normally closed solenoid valve (ie secondary open valve). When the coil is energized, a magnetic field, magnetic force, the suction from the core, the small valve port is opened the piston, the upper piston pressure unloading, the pressure difference in pushdown from the piston to open the main valve port is formed passages. Cut off the power, and the core loss of the magnetic force of the spring under the action of the automatic reset and falls off the small valve port of the piston, the piston speed is formed above the pressure to the pressure piston, the cut line in the closed normal. Suitable for: aerospace, defense, nuclear industry, shipbuilding industry, petrochemical, power, machinery, medical, air conditioning. Parameter Description: Control mode: normally closed, normally open, according to the conditions required to choose from. Action: direct acting, pilot-type recoil type (no differential pressure type). Choose one according to aperture size, medium pressure, according to the conditions required to choose from. Protection Type: ordinary type, dust-proof, water-proof, explosion proof, marine type, according to the conditions required to choose from. Connection: internal thread connection, flange connection, according to the conditions required to select, but diameter than DN50, both flange connection. Body material: 304 stainless steel, 316 stainless steel, according to the conditions required to select the media temperature: -50-60 ℃, -196 ℃, according to the conditions required to choose from. Ambient temperature: -10-40 ℃, -20-40 ℃, -40-40 ℃, -10-60 ℃, according to the conditions required to choose from. When ordering, please provide the following information:? A nominal diameter (mm), nominal pressure (MPa), operating temperature range of two straight and before the pressure regulating valve, the valve pressure of 3 media name and status at 4 single seat??? valve supply voltage (220V or 380V, default 220V) 5 Input signal:??? 4-20mA, or 1-5V (default 4-20mA) 6 single-seat control valve body, the trim material requirements seven other special requirements (eg corrosion requirements, proof grade requirements, leakage class limits, etc.) USA Walker (WORK) Valves Chinese agents welcome your inquire and order!