Features: 1.Thickening housings, more durable. 2.Pure copper wire coil, magnetic well, more stable. 3.Electromagnetic valve before installation, please clean pipes thoroughly. Specification: Model: 2w-200-20 voltage: Ac 220v pipe size: 3/4 inch material: Brass flow aperture: 20mm max pressure: 10kg/cma² working medium: Air,water,oil operating method: Direct action working temperature: -5-+80 environment temperature: -10-+50 working pressure difference: 0-1mpa package includes: 1 x 2w-200-20 ac220v 3/4inch solenoid valve.