When the tube start injection valve is in open posittion with large number of exhaust gas, when the air line up. the full of water in the valve, floating ball and drives the valve disc closed that is to stop the exhaust . When water tube is transport normally such as there is a small amount of air gathered within the valve to a degree, then water levels fall in the valve and floating ball drops, air is being exhausted from holes at this time. When the pump stops. the tube would be empty or produce negative pressure, the piug will opened quickly and sucked in air to ensure pipeline safety.
Note:cannot be used in sewage pipe
Valve Features:
Design & Manufacture: GB
Face to Face Dimension: GB
Flanged Dimension: GB4216
Inspect & Test: GB9113, API598
Pressure Ratings: PN10 & PN16
Suitable Medium | Water, Oil, Gas and etc. |
Main material | CAST IRON,ASTM A216 WCB, WCC, WC6, SS304, SS316, CF8, ETC. |
Suitable Temperature | ≤80 |
Nominal Pressure | PN10--PN25 |
Nominal Diameter | DN25--DN150 |
Flange Dimension | ASME B16.5, BS4504, ISO2531, ISO7005 and other standards conforming to the requirements |
Face to Face Length | API594,BS5155, ISO5752, DIN3352 and other standards conforming to the requirements |
Established in 1985, Zhejiang Guanlong Valve Machinery Co., Ltd. is a professional manufacturer which integrating development, production, sales, installation and service into an organic whole.
Our company mainly manufactures valves according to ANSI, API, DIN, BS, and Chinese GB standards. We are specializing in producing hydraulic control valves, check valves, multifunctional pump control valves, pressure reducing valves, adjusting valves and butterfly valves. There are 6 major series and more than 1000 specifications now.
Our products are exported to worldwide, such as the USA, Canada, Europe, the Middle East and South East and Southeast Asia. With high content of technology and reliable quality, our products have gained good fame from the customers.
After nearly 20 years of development and self-perfection, our products are supported by novel design, excellent structure, elaborate workmanship, exquisite technology and complete testing measures.
We will fully exert our advantage on technology and management to improve continuously our product quality and manufacture high quality valve products to satisfy the customers.