When it comes to the selection of gate valves, the options between resilient seat and metal seat are quite popular. The resilient type flanged gate valves are primarily used in drinking water applications for its non-corrosive and other value-adding benefits.

At Dutco Tennant LLC, we supply high quality gate valves and other valving solutions that are needed for varied project needs. We are also exhibiting resilient type flanged gate valves at this year’s WETEX 2022 which will start from 27th September 2022 to 29th September 2022.

Before showing up at our exhibit, why not learn a bit more gate valve types especially knowing the difference between resilient and metal seats. Keep reading till the end to find out about them.

Different Sealing Surface Material

Resilient Seated Type

In a resilient seated valve, the two contacting sealing surfaces are either separate or all soft materials such as rubber, plastic, etc. are used. Since the material that is soft is deformed easily and fills up the nonuniform sealing surface, the soft sealing is able to achieve an extremely high degree of moderate sealing performance and this high degree sealing performance can be achieved repeatedly. However, the only drawback of such soft sealing materials is that it is affected by the temperature and pressure that the sealing materials can withstand.

Metal Seat Type

As the name suggests, this type of seat is made from metal. The metal sealing surface is susceptible to deformation because of the impact of the sandwiched and medium particles, it can be further damaged by corrosion, wear and erosion. On the other hand, if the worn out particles are less uneven than the surface, the accuracy of the relatively abrasive surface shall be enhanced when the sealing surface is running in.

Metal Seated Gate Valve

The opening and closing of this seating gate valve is a gate and the movement direction of this gate is perpendicular to the fluid flow direction. This seating type gate valve can only be completely open or shut and cannot be throttled or adjusted.

As per the sealing surface configuration, the metal seated gate valve can be categorised  into parallel gate valve and wedge gate valve. 

Resilient Seated Gate Valve

The opening and closing for soft-seated resilient type gate valves are also gates. The direction of the movement is perpendicular to the fluid direction. The resilient seated gate valves are generally categorised into dark-stem resilient seat gate valve and bright-stem resilient seat gate valve.

Generally the lifting rod includes a trapezoidal thread, through the nut in the gate’s middle and the guide groove upon the body of the valve, the rotary motion is altered into linear motion, that is, the operating torque is turned into operating thrust.

When the valve is opened up, and when the lift height of the gate is 1:1 times the diameter of the valve, the unblocking of fluid passage occurs, however, this position is untrackable during operation.

Applications of Resilient Seated Gate Valve

  • Suitable for non-corrosive liquid and gas medium at room temperature such as clean water, water treatment, sewage pipelines. Additionally, it can offer good leak-free performance.

If you wish to learn more about Resilient type flanged gate valves then make sure to visit Dutco Tennant LLC exhibit in Stall no. 6B 20 at WETEX 2022.