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Electric bellows stop valve

  • [valve model]: WJ941H、WJ941W、WJ941Y
  • [diameter specification]: DN15-DN300
  • [structural form]: Bellows structure
  • [valve body material]: Cast steel (WCB), stainless steel (304, 316, 316L)
  • [nominal pressure]: PN10、PN16、PN25、PN40
  • [applicable temperature]: -40℃~450℃
  • [application scope]: Steam, flammable and explosive, heat transfer oil, toxic medium, etc
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  •  Electric bellows stop valve

Product overview

The electric bellows stop valve adopts double bellows sealing structure, which has the characteristics of no leakage and no internal leakage. It is suitable for the high-risk places of steam, flammable, explosive, heat-conducting oil, high-purity and toxic medium. Compared with the ordinary stop valve, the valve stem of the electric bellows stop valve does not contact with the medium under high temperature conditions, so as to ensure zero leakage of the valve stem, at the same time, it can ensure sufficient strength and toughness, and has a longer service life, and can be opened and closed for tens of thousands of times.
 Structure of electric bellows stop valve
Features of electric bellows stop valve:
 
1. The sealing performance is greatly improved by adopting bellows sealing structure and changing the sealing to static sealing.
2. Double seal, stainless steel bellows protection seal, stem packing protection seal, if bellows failure, stem packing will also avoid leakage.
3. Under the condition of high temperature and high pressure, the valve has no leakage.
4. The outer seal of the valve adopts bellows seal, graphite and stainless steel gasket seal, which is reliable and can be used for a long time without replacing the sealing packing.
5. The valve has no leakage and internal leakage, reducing energy loss and improving the safety of plant equipment.

technical parameter

Nominal diameter DN15~DN300(MM)
Nominal pressure PN1.0、1.6、2.5、4.0MPa
Connection form Flange connection
structural style Straight through
Driving form Electric control (power supply pressure)
body material Carbon steel WCB, stainless steel 304, stainless steel 316 、316L
Applicable temperature -40℃~450℃
Sealing form Bellows seal
Applicable media Steam, flammable and explosive, heat transfer oil, toxic medium, etc
control mode Switch type (switch two position cut-off control), optional explosion-proof type, with manual device

The difference between electric bellows stop valve and common stop valve is as follows
The electric bellows stop valve uses the sealed bellows which can be stretched and compressed to replace the packing seal, which can effectively prevent the leakage caused by the packing loss. It is generally used for the medium transmission with strong permeability, such as the valve on the hydrogen system, as long as the bellows is not damaged, there is no leakage; while the general stop valve is sealed with packing, which is easy to leak, and the ordinary stop valve is used for sealing Valve with packing seal, the valve stem and packing will slide, easy to leak (spool) at low temperature.

Quotation process

Valve price:

Due to the different requirements of order quantity, packaging and delivery mode, as well as the fluctuation of valve raw material price, the valve price will be greatly different. Therefore, the price of our products is not indicated on the website. Please understand.

If you select a valve product on this website, if you need to know the price or ask for relevant technical information, please contact us. We will reply immediately, and according to your requirements, we can select the right valve products for you, so that your purchasing process is easy and pleasant.

Quotation process:

1. Please fax the name of your company, the name of your company and the place of delivery, the name of your company and the place of delivery 021-36311208 Or telephone number: 021-60547555。

2. After receiving the customer's purchase list, our company will provide customers with valve quotation "price list", model selection "valve model" and technical guidance as soon as possible.

3. Specific matters to be agreed: delivery time, special requirements, etc.

Ordering instructions

1、 If the customer has special requirements for the product, the following instructions shall be provided in the order contract:
(1) Valve body material (such as: plastic, cast steel, stainless steel...)
(2) Connection type (e.g. flange, thread, clamp...)
(3) Nominal diameter, pipe size
(4) Ambient temperature range
(5) Air pressure, supply voltage
(6) Fluid properties (including nominal pressure, temperature, viscosity or acidity or alkalinity)
2、 The company configures all kinds of driving devices according to the special requirements of customers. (electric control, pneumatic control)
3、 If the customer provides the determined valve type and model, the customer shall correctly explain the meaning and requirements of the valve model (for details, refer to the description of valve model preparation), and sign the contract under the condition that both parties understand and agree.
4、 After the customer tells the required valve model, specification, quantity and delivery time and place, 20% of the total amount of deposit or full payment shall be timely remitted to our company's account, and the rest shall be remitted before delivery, so as to arrange delivery in time.
5、 After confirming the purchase, our company carries on the production in strict accordance with the delivery date. According to the different types and quantities of orders, the product processing cycle is generally 3 to 30 days, and the specific delivery time is subject to the contract. In order to ensure that the goods you ordered are in place in time, please order as early as possible.
6、 According to the needs of customers, our company provides network distribution services, delivering goods to the branches (offices) in major cities, and providing door-to-door delivery service. After the product acceptance, our company will provide after-sales service.
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