人妻中出无码一区二区三区_免费超爽大片黄_国产激情久久久久影院小草_日韩精品无码免费一区二区三区_亚洲欧美中文日韩V日本_人妻少妇一区二区三区_亚洲AV色香蕉一区二区三区_五月婷婷久久

Nominal Diameter:DN50- 60mm

Sealing Pressure:1.1 times the nominal pressure

Nominal Pressure: 1.0/1.6/2.5MPa

Pressure Resistance of Valve Body:1.5 times the nominal pressure

Operating Temperature: 0~80℃

Applicable Medium: water, gas, air, etc.

Signal gate valve and signal butterfly valve are often used in automatic sprinkler fire-fighting pipeline system to monitor the water supply pipeline and remotely indicate the valve opening.

Rising stem gate valves and gate valves with opening indication are also often used in fire protection systems, If the installation position of the gate valve is high from the ground, the rising stem gate valve is generally used, which can clearly indicate the opening of the valve. If the installation position is low. The gate valve with opening indication is required.