What is a metal hard seal butterfly valve,Metal hard seal butterfly valve is mainly composed of valve body, butterfly plate, valve shaft, valve body sealing ring, butterfly plate sealing ring, shaft sleeve, self-lubricating bearing and driving device. The high performance metal hard seal butterfly valve drives the valve shaft to rotate through various driving devices, and drives the butterfly plate to rotate within 90 ° through the pin shaft, so that the butterfly plate is in the open or closed state, so as to achieve the purpose of connecting or cutting off. It is widely used in metallurgy, hydropower, thermoelectricity, heating, urban water supply and drainage, farmland irrigation and drainage and other industries. The applicable medium is gas, steam, air and water, etc. in the pipeline system.
What is a metal hard seal butterfly valve
Structural features of metal seal butterfly valve:
① Metal-seated butterfly valves can have different offset and sealing arrangements. Reduced rubbing during movement is a feature of the specified geometry, not a property established by the metal seat alone.
② The elastic seal is produced by torque.
③ The ingenious wedge design enables the valve to have the automatic sealing function of closing more and more tightly, with sealing performance subject to the actual design, test conditions and agreed acceptance criteria.
④ Small volume, light weight, light operation and easy installation.
⑤ According to the user’s requirements, pneumatic and electric devices can be configured to meet the needs of remote control and program control.
⑥ Confirm the suitability of the selected component and lining materials for the actual medium and operating conditions; material selection alone does not establish suitability for every medium.
⑦ The sealing ring is made of stainless steel, which has the double advantages of metal hard seal and elastic seal. It has excellent sealing performance both at low temperature and high temperature.
Difference between metal hard seal butterfly valve and rubber seal butterfly valve:
What is a metal hard seal butterfly valve,The disadvantage of rubber seal butterfly valve is that when it is used for throttling, it will produce cavitation due to improper use, which will cause peeling and damage of rubber seat. For this reason, now the international development of metal seal butterfly valve, metal hard seal butterfly valve for eccentric metal seal structure, sealing form for metal to metal seal, replaceable metal seal ring for metal seal, stainless steel plate and graphite composite plate seal ring for metal seal. Double-offset and triple-offset butterfly valves must be distinguished by their actual geometry. A triple-offset design adds an inclined seat-and-seal cone axis to the two shaft offsets; confirm the selected construction, sealing materials and shutoff requirements from the applicable product documentation.In addition to flange connection and wafer connection, hard sealing butterfly valve also has lug type butterfly valve,You can go to our valve selection to find what you need, if not, you can contact us, and you will be satisfied
Frequently Asked Questions
Does a metal seat automatically mean the valve will have no leakage?
Do not treat the seat description as a leakage guarantee. Specify the required shutoff performance and test conditions and request confirmation for the exact valve design and order.
Which seat construction will I receive if the description mentions different designs?
Ask for the selected valve drawing and the seat and sealing-ring material specification. The article discusses several arrangements; confirm the actual construction rather than combining their features into one assumed product.
Can I order pneumatic or electric operation for a metal-seated butterfly valve?
The article mentions both arrangements. Provide the required valve duty, operating conditions, utilities and control requirements and ask for confirmation of the complete valve and actuator assembly.