Different Types of Gate Valves You Must Know About

 

Gate valves are the most common type of valves which are used majorly for water supply systems. These types of valves are linear motion valves and operate to allow or stop the fluid flow. Gate valves have got their name from their closure element which slides into the fluid flow stream to offer shutoff, so acting just like gates. Purchase gate valves after gaining knowledge about gate valve types. Get in touch with the best supplier of gate valves. Continue to read this blog to explore a lot about gate valves and types.

 

What are gate valves?

 

Gate valves are also known as sluice valves. They open through the lifting of a barrier out of the fluid path. Gate valves need little space and they restrict the fluid flow hardly when the gate opens fully. Generally, gate valves are used only for isolation purposes, completely open or closed. Gate valves are not apt to be used for throttling purposes as the high-velocity fluid flow can cause the partially open disc to chatter. It can promote disc erosion along with seating surfaces. 

 

What is the function of gate valves?

 

The close/open fluid flow can be achieved through gate movement of gate valves out or into the stream. The fluid flow through gate valves may be in either direction. Gate valves are used majorly in petrochemical plants and refineries where there is low pressure. Gate valves are used also for residential usage. 

 

What are the different types of gate valves?

 

 In accordance with the type of stem, gate valves are divided into two types:

 

1. Rising Stem Gate Valves 

 

These types of gate valves have thread outside the body. When you rotate the handwheel, the nut gets driven. It leads to the raising of the stem. These stem threads never come in contact with the flow medium. So, they don't get subjected to corrosion or erosion.

 

Benefits of using rising stem gate valves:

 

1. The fluid flow direction of the particular medium is not restricted.

2. These valves do not disturb the fluid flow, and also do not reduce the pressure.

 

2. Non-rising stem gate valves

 

Non-rising stem gate valves are also called insider screw valves. The stem of these valves is threaded to the gate. In NRS valves, the stem turns to close & open the gate. The stems do not move up or down.

 

Benefits of using non-rising stem gate valves:

 

1. Non-rising stem gate valves are constructed with a high-class range of materials.

2. These valves take up little space.

 

Types of gate valves according to materials:

 

1. Cast iron stem gate valves

 

Gate valves are available in the cast iron body. Epoxy-coated cast iron bodies make these valves corrosion-resistant.

 Benefits of using cast iron stem gate valves:

 

a) Cast iron stem gate valves have low-pressure drop & high thermal resistance.

b) These valves are energy-efficient.

2. Brass gate valves

 

Brass stem gate valves are used in commercial and residential applications. These valves are made with a brass body and brass threaded bonnets. 

 

Benefits of brass gate valves:

 

a) Brass gate valves are very safe especially for drinking water.

b) As compared to other valves, brass gate valves are highly durable.

 

Conclusion

 

Gate valves are best for high-pressure & temperature applications. They offer good shut-off characteristics and have a low-pressure drop with less frictionless loss. For all these reasons, people prefer using gate valves. Get into contact with a trusted supplier like Dutco Tennant LLC. We are the best in supplying plumbing gate valves and lockshield gate valves in the UAE. You can call us at +9714-2152799 to receive more details about the products.