Multistage the development prospect of the pneumatic control valve and its parameters

Facing the continuous and stable development of our state-owned economy, widening investment in fixed assets, especially several century engineering construction requires a lot of form a complete set of multistage type pneumatic control valve. The advent of the era of industrialization in our country, the department of department of petrochemical industry, electric power, metallurgy, chemical industry and urban construction using a large valve will increase the demand for multi-level type pneumatic control valve is higher. 1. Multistage type pneumatic control valve components in the valve: the valve core type: balanced valve core flow characteristics: air defense operation sleeve: stay percentage and linear characteristics; Low noise sleeve: linear material features: 17 - 4 ph, 0 cr17nimo2 and surfacing welding alloy 2 too. Multistage type pneumatic control valve actuator: style: HA film actuator diaphragm spring material, ethylene propylene rubber nylon spring clamp range: 0. 08 ~ 0. 24, 0. 04 ~ 0. 24 mpa gas supply pressure: 0. 28, 0. 30, 0. 35, 0. 40 mpa air joint: Rc1/4 environment temperature: - 30 ~ + 70 degrees Celsius valve function types: closed type gas or gas open attachments: locator, hand wheel, pneumatic valve position transmitter, etc. 3. Multistage type pneumatic control valve performance: leakage: ANSIB16 conform to the standards. Level iv, 104 less than the rated CV of 0. Back to the poor: 01% to 3% ( Don't take the locator) ; 1% ( With locator) Linear: plus or minus 5% ( Don't take the locator) , plus or minus 1% ( With locator) The adjustable range: 50:1