Self-operated Nitrogen Sealed Control Valve(ZZDQ)
Summary:Summary:
Self - operated nitrogen sealed control valve is mainly composed of fast relief valve and self - operated micropressure control valve. It is mainly used to hold the top of the container to protect the gas.
| Self-operated Nitrogen Sealed Control Valve(ZZDQ) |
| Model |
ZZDQ |
| Size |
DN20~100mm |
| Structure Form |
Straight-through Casting Type |
| Body Material |
Cast steel(WCB);
Stainless Steel(304;316;316L) |
| Norminal Pressure |
PN1.6; PN4.0MPa |
| Working Temperature |
-20~-350ºC |
| Application Range |
Petroleum, chemical, gas and other media. |
| Feature |
It needs no external energy and can be adjusted in trems of its own pressure. |
| Body Specification |
| Nominal Diameter |
DN20~200mm |
| Flange Standard |
ANSI,JIS,GB,JB,DIN |
| Body Material |
Cast steel; Fluorine PTFE(F46) |
| Body Type |
Single Seat Type; Double Seats Type; Sleeve Type |
| Working Temperature |
-20~-350ºC |
| Plug Material |
Stainless Steel(Metal-to-metal)
Stainless steel inlaid with rubber ring(Soft Seal) |
| Stem Matetial |
Stainless Steel |
| Pressure Balance |
Stainless Steel Bellows(DN15-125) |
| Flow Characteristic |
Quick-opening |
| Structure Form of Control Valve |
| 1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
11 |
Main
Body |
Core |
Actutator |
Reducing Valve |
Throttle Valve |
Conductor
core |
Detector |
Preset
Spring |
Main
Body |
Detector |
Spring |
Features:
The self-operated nitrogen sealed valve is characterized by energy saving, sensitive action, reliable operation, convenient operation and maintenance, etc. It is widely used in petroleum, chemical and other industries. The self - operated nitrogen seal valve does not require external energy. It can work without electricity and gas source, which is convenient, energy saving and cost reducing.
Working principle:
When the pressure in the storage tank rises to the set pressure, the fast relief valve opens quickly to relieve the excess pressure in the valve. When the pressure of the micropressure control valve decreases in the storage tank, open the valve and fill the valve with nitrogen. Since the micro-pressure control valve must be used under the pressure of 0.1mpa and the field pressure is high, the ZZYP pressure control valve must be installed to reduce the pressure below 0.1mpa before it can be used.
Company Introduction:
Zhitai Valve Co., Ltd is a member of Valve Association of Longwan District, is located in Longwan Central Industrial Zone, Wenzhou City. It'a professional technology company integrated with development, manufacturing, sales, and after-sales services of valve actuators and and self-controlled valves. Presently, our main products include: pneumatic actuators, pneumatic valves and pneumatic control valves; electric actuators, electeic valves and eletric control valves; automatic control products. Our products are widely applied in natural gas, electricity, petroleum, chemical, metallurgical, construction, pharmacy, paper, printing and dying. Zhitai series actuators and valves are the best choice for automatic fluid control engineering and equipment manufacturing. We sincerely welcome customers from home and abrode to visit us for supervision, communication and cooperation. It's a great honor for us to cooperate with you.
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