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Resilient or metal seated gate valves

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Resilient or metal seated gate valves

Resilient or metal seated gate valves

SHOchris

(Civil/Environmental)

(OP)

13 Aug 08 10:55
I have read up on them some, but dont really see a reason to choose one over the other... either have a better seal, or last longer...
 

Is there reason to spec one over the other instead of just life span? The city I am doing work for specs only brass metal seated, but the contractor says that he has never used anything but resilient wedge gate valves...and that they are "better"I have read up on them some, but dont really see a reason to choose one over the other... either have a better seal, or last longer...

"Don't worry about the world coming to an end today. It's already tomorrow in Australia."  
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Suggested reading:
Unlocking the Benefits of Using Din3352 F5 Resilient Seated Gate Valve
Revolutionizing Home Plumbing: Are Trap Valves Necessary?

Yaxing Valve Product Page

RE: Resilient or metal seated gate valves

rconner

(Civil/Environmental)

13 Aug 08 12:43

1.  Basically a clear and unobstructed waterway, that does not exhibit a bottom potentially debris-trapping "pocket" (like to receive the wedges that hit down in same and in various fashions spread e.g. IBBM disks).
2.  Demonstrations that at least some resilient-seated gate valve designs will effectively seal (and even bottle-tight) against at least some significant foreign objects like rocks and steel nails (that will generally thwart metal seals when trapped in the seat area).
3.  At least some resilient-seated gate valve designs employ quite strong principal parts of ductile iron only, whereas IBBM gate valves per some standards/designs still can contain weaker gray cast iron.

While I believe "better" is something that should ultimately be defined by the users (including I would think Contractors, as it appears is one party you're already conversing with, who sometimes are asked to even test against such valves), I believe there has been a dramatic relative increase in demand over many years for resilient-seated as opposed to IBBM valves, and particularly in common municipal fields.  [You may be interested e.g. in some perspectives of a very large valve manufacturer (who I know has produced both types for a great many years) reflected now at e.g.  
 

Resilient-seated gate valves have been used for more than a quarter century. While there are perhaps many aspects to compare, I believe a few advantages of modern resilient-seated valves for example over iron-body bronze mounted (IBBM) gate valves are:1. Basically a clear and unobstructed waterway, that does not exhibit a bottom potentially debris-trapping "pocket" (like to receive the wedges that hit down in same and in various fashions spread e.g. IBBM disks).2. Demonstrations that at least some resilient-seated gate valve designs will effectively seal (and even bottle-tight) against at least some significant foreign objects like rocks and steel nails (that will generally thwart metal seals when trapped in the seat area).3. At least some resilient-seated gate valve designs employ quite strong principal parts of ductile iron only, whereas IBBM gate valves per some standards/designs still can contain weaker gray cast iron.While I believe "better" is something that should ultimately be defined by the users (including I would think Contractors, as it appears is one party you're already conversing with, who sometimes are asked to even test against such valves), I believe there has been a dramatic relative increase in demand over many years for resilient-seated as opposed to IBBM valves, and particularly in common municipal fields. [You may be interested e.g. in some perspectives of a very large valve manufacturer (who I know has produced both types for a great many years) reflected now at e.g. http://www.acipco.com/afc/videos.cfm .]

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News

1. Basic structure of Gate Valve

Gate valve is the most common valve in water supply or water treatment systems. It requires little space along the pipe axis and the function is relatively more simple: with a closure element sliding into the flow stream to provide shutoff and open acting as a gate, the gate valves are used to isolate specific areas of the water network during maintenance, repair works, etc.

2. Metal Seated Gate Valve

Initially, the metal seated gate valve was the only option in the market. To stop the stream, the wedge slides towards a groove in the invert of the gate valve body.  With a conical wedge and angular sealing devices, the metal seated wedge requires a depression in the valve bottom to ensure a tight closure. However, this structure might cause sand and pebbles embedded in the bore and the pipe system will never be completely free from impurities. And as time goes by, these accumulated impurities will reduce the wedge&#;s ability to be drop-tight.

 

3. Resilient Seated Gate Valve

Unlike the wedge in the metal seated gate valve, the wedge in the resilient seated gate valve is encapsulated in resilient material to provide a tight seal.

With this design is no longer necessary a groove at the bottom of the valve.

The resilient seated gate valve has a plain valve bottom allowing free passage for sand and pebbles in the valve. Even though the impurities pass as the valve closes, the rubber surface of the wedge will absorb these while the valve is closed.

 

We provide a great variety of gate valves, for more information, please click: https://www.watersvalve.com/product-category/gate-valves/

 

 

For more Din F5 Resilient Seated Gate Valveinformation, please contact us. We will provide professional answers.