Call Us Today!  E-mali: miaoli@bdvalvula.com    WhatsApp: +86-13722429051
Contact         News
Home » News » Industry News » Difference Between Soft Seal Gate Valve And Hard Seal Gate Valve?

Difference Between Soft Seal Gate Valve And Hard Seal Gate Valve?

Views: 68     Author: Site Editor     Publish Time: 2023-02-24      Origin: Site

Soft seal gate valve and hard seal gate valve are two major categories in the gate valve series. Hard seal and soft seal can sometimes compensate for each other, and sometimes they are independent of each other. So what is the relationship between soft seal gate valve and hard seal gate valve? What are the main differences?


Difference Between Soft Seal Gate Valve And Hard Seal Gate Valve-1_1


1. What is a Soft Seal Gate Valve

Gate Valve is one of the most widely used valves in various fluid transportation projects. Traditional gate valves generally have phenomena such as easy fluid leakage and serious corrosion of internal parts. In the ordinary soft seal gate valves on the market, the stem shaft seal is easy to leak, and it is impossible to replace the sealing ring under continuous water and at any opening degree.


The elastic seat seal Gate Valve adopts novel structural design, strict manufacturing technology and high-performance new materials, which overcomes the defects of the traditional gate valve, such as poor sealing, internal parts, especially the gate plate, easy to rust, rubber elastic fatigue and aging, reliable sealing performance, Light and quick operation, simple and convenient maintenance and long service life. Suitable for domestic water systems, water supply and drainage systems, sewage treatment systems, chemical fluid delivery systems, etc., used as a cut-off device on fluid lines in the construction, urban environmental protection, petrochemical, pharmaceutical, food, metallurgy, textile, power and other industries (not Suitable for throttling).


2. Sealing material


Soft seal Gate Valve: the seal pair is made of metal materials on one side and elastic non-metallic materials on the other side, which is called “soft seal”. This kind of seal has good sealing performance, but it is not resistant to high temperature, easy to wear, and has poor mechanical properties.


Hard seal Gate Valve: The two sides of the seal pair are made of metal materials or other harder materials are called “hard seals”. This kind of seal has poor sealing performance, but has high temperature resistance, abrasion resistance and good mechanical properties.


3.  The use of conditions


Soft seal Gate Valve generally have a high seal, while hard seals can be high or low depending on the requirements; soft seals need to be fireproof because the material of soft seals can leak at high temperatures, while hard seals do not have this problem; seals can usually be manufactured at very high pressures, but soft seals cannot; soft seals cannot be used in some cases because of the flowing medium. Finally, hard seal valves are usually more expensive than soft seals. As for manufacturing, there is little difference between the two; the main difference is the valve seat, which is non-metallic for soft seals and metallic for hard seals.


With the continuous development of our industrial market, it is necessary to understand the difference between soft seal gate valve and hard seal gate valve, which may not only affect productivity but also greatly affect the economic benefits.


4. Equipment selection


Soft and hard seal gate valve selection is mainly based on the process medium, temperature, and pressure. General media containing solid particles or abrasion or temperature higher than 200 degrees. It is best to use a hard seal. The diameter greater than 50 valve pressure difference is large, consider opening the valve torque. , when the torque is large, should be selected fixed hard seal ball valve, whether soft seal or hard seal, its sealing grade can reach 6.


5. Structural characteristics


The general Gate Valve used in the market for a long time is generally leaky or rusty phenomenon, WESDOM the introduction of high-tech rubber and valve manufacturing technology produced by the resilient seat seal gate valve, to overcome the general gate valve poor sealing, rust, and other defects, resilient seat seal gate valve use the resilient gate plate to produce a trace of elastic deformation compensation effect to achieve a good sealing effect, the valve has a light switch, reliable sealing, elastic memory The valve has the advantages of light opening and closing, reliable sealing, elastic memory, and good service life.


Whether it is a soft seal gate valve or hard seal gate valve, in the process of use, we should pay attention to the following points: 


①Handwheel, handle and transmission mechanism are not allowed to be used for lifting, and collision is strictly prohibited.

② Double gate valve should be installed vertically (i.e., the stem is in a vertical position, handwheel at the top).

③ gate valve with bypass valve should be opened before opening the bypass valve (to balance the pressure difference between the import and export and reduce the opening force).

④Gate valve with transmission mechanism should be installed according to the product instruction manual.

⑤ If the valve is frequently opened and closed, it should be lubricated at least once a month.


View Contact

Phone: 86 312 8631222
WhatsApp: +86-13722429051
E-mail: miaoli@bdvalvula.com
Address: Room No.2428, #B, Diangu Yuansheng Commecial Building, No. 1898, Chaoyang North Street, Baoding City, Hebei, China

Product

Quick Links

Copyright © 2022 BAODINGVALVULA Co., Ltd.All Rights Reserved.