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| Product Name: |
Trunnion Mounted Ball Valve
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| Supply Ability: |
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| Related proudcts |
valve, ball valve, china valve, |
| Specifications |
(K)Q661 |
| Price Term: |
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| Port of loading: |
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Structure and Working principle
(1) Block-up and excretion
When the valve is in the closed state (Fig.7), the seat ring on the upstream and downstream sides cuts off the fluid and the accumulated matters in the middle cavity of the body can be excreted. The excreting device (Fig.8) features the following functions.
a) Checking if the seat ring leaks or gets damaged beforehand.
b) Reduce pollution to the valve due to the medium replacement.
c) The packing on the stem portion can be replaced when the valve is in the fully open or close state under the working pressure.
2) Automatic pressure discharge
When an abnormal pressure rise occurs with the medium stayed in the middle cavity of the valve due to rising temperature, the seat ring will come off from the ball and automatically discharge pressure (Fig.9) or the safety (Fig.10) valve mounted on the body ensures the system safety.
(3) Complete seal
The unique sealing mode of the ball valve makes the fluid completely cut off.
(4) Fire- fighting structure
If the Teflon seat ring is made softened and burnt in case of fire or an abnormal temperature rise, the valve can be still reliably operated to prevent the from expanding and the seat ringĄ¯s support can be contacted with the ball (Fig.11) to act as an instantaneous seal, conforming with API 607.
(5) Static-proof structure
During valve operation, the friction between the ball and the PTFE seat ring will produce electrostatic charges and they will be accumulated onto the ball. To prevent electrostatic-proof device (Fig.12) is mounted on the valve, which can guide the charge out through the electric path by both ball and body via the spring.
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| Company: |
Beijing Valves Co***ny
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| Contact: |
Judy Qi |
| Address: |
Rm1010,Bldg,No2,So Boss&Box Cneter,South Ring Road,Fengtai districtBeijing,China |
| Postcode: |
100068 |
| Tel: |
861051650388 |
| Fax: |
861051657599-815 |
| E-mail: |
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