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Athena Double Eccentric Butterfly Valve Manufacturer | EN593 Water Valve Supplier
Double Eccentric Flange Butterfly Valve

RKS fluid was founded in 1997. We are a production workshop for both foundry and machining, research & development center, and quality inspection cent...
Swing check valve

Swing check valve is mounted with a disc that swings on a hinge or shaft. The disc swings off the seat to allow forward flow and when the flow is stop...
Hydraulic Control Valve

Features： Fully bore globe pattern design, lowest head loss while fully open Keep stable working condition even the flow rate close to zero High sens...
Ball Check Valve

Ⅰ Business area: fluid control products, technology and environmental protection products. Ⅱ Advanced CNC machining centers, professional process ce...
Metal Seated Gate Valve

RKS fluid was founded in 1997. We are a production workshop for both foundry and machining, research & development center, and quality inspection cent...
Resilient Seated Gate Valve

Series: SASQUATCH series soft seal gate valve Port size: DN50 - DN900 (NPS2-NPS36) Pressure rating: PN10, PN16 Temperature: 0℃~80℃ Connection: Flange Certificate: CE ,WRAS,API,OHSAS18001:2007,ISO9001:2015
Resilient Seat Butterfly Valve

Series: HYDRA Series Resilient Seat Butterfly Valve Temperature: -29℃ ~ +120℃ Pressure: PN6, PN10, PN16(Class 150) Port Size: DN32-DN2400(NPS1 1/4-NPS96) Power: Manual, Electric, Pneumatic, Hydraulic

News

The Difference Between A Lug and Wafer Butterfly Valve

2019-02-12 16:59:28

Butterfly valves have been around for a long time, and are used for a variety of applications. They made their first appearance during the 1930s, and have been utilized by several industries ever since. Often made out of cast iron, butterfly valve's name is based from the functionality of its disc.

Wafer type butterfly valve installation instructions and steps

2019-01-03 16:27:13

The wafer butterfly valve is one of the most common types of valves in industrial pipelines. The structure of wafer butterfly valve itself is relatively small. It is only necessary to put the butterfly valve in the middle of the flange at both ends of the pipe, and use the stud bolt to pass through the pipe flange and the pair.

How Does a Pressure Reducing Valve (PRV) Work?

2024-10-15 16:58:28

Manual valve operation method

2019-04-01 11:50:16

The manual valve is a valve operated by the handle and the hand wheel, and is a commonly used valve on the equipment pipeline.

Twenty-five Taboos for Valve Installation

2019-09-06 10:23:57

Valves are the most common equipment in chemical companies. It seems easy to install valves, but if they are not implemented in accordance with the re...

Valve common standards and differences

2019-05-07 17:37:21

DIN standard now uses EN standard structure length
EN 558-1 PN flange connection valve construction length (instead of DIN 3202), EN 558-2 CLASS flange connection valve construction length (instead of BS2080), EN 12982 butt weld end valve construction length (instead of DIN 3202), DIN standard The length of the structure including the length of the API valve is basically the same as the length of the GB...

Resilient Seated Gate Valve

2022-10-17 16:09:38

Resilient-seated gate valve with bolted cover connection; made of ductile iron materials and with epoxy coating, designed as both clockwise and anti-c...

Butterfly Valve Seat & Seal Ring Replacement Method

2021-02-01 18:14:53

The butterfly valve disc is a key component of the butterfly valve, which acts on closing and opening and closing. Butterfly valve seat and butterfly ...

What's the working principle of Kieselguhr Filter?

2019-07-01 13:05:32

What is Kieselguhr Filter? What's the working principle of Kieselguhr Filter? The kieselguhr filter (Candle filter / Cake Filter) which we for customized for fluorine chemical plant six more lithium fluoride phosphate phosphorus process have been installed and working for two years

New designed PTFE RPTFE sealing replaceable seat high performance butterfly valve

2022-04-24 10:39:22

MINOTAUR series replaceable seat high performance butterfly valve

Contact us

RKSfluid Flow Control Company

Web: www.rksfluid.com
Tel: +86 24 2318 0188
Fax: +86 24 2318 0788
Mail: info@rksfluid.com

The Main Classification And Use Conditions Of Valve Sealing Materials

2022-02-11 11:04:58

Valve sealing is the most important part of the entire valve. Its main purpose is to prevent leakage. The valve sealing seat is also called a sealing ring. It is an organization that directly contacts the medium in the pipeline and prevents the medium from flowing. When the valve is in use, there are a variety of different media in the pipeline, such as liquid, gas, oil, corrosive media, etc., and the seals of different valves are used in different places and can adapt to the various medium.

Then, valve seal materials can be divided into two main categories, namely, metallic materials and non-metallic materials. Non-metallic seals are generally used for pipelines at room temperature and pressure, while metal seals are widely used and can be used for high temperature and high pressure! Here is a brief introduction to the conditions of use of various sealing materials and commonly used valve types.

1. Synthetic rubber
Synthetic rubber's comprehensive properties such as oil resistance, temperature resistance, and corrosion resistance are better than natural rubber. Generally, the use temperature of synthetic rubber is t≤150℃, and that of natural rubber t≤60℃. Rubber is used to seal shut-off valves, gate valves, diaphragm valves, butterfly valves, check valves, pinch valves, and other valves with a nominal pressure of PN≤1MPa.

2. Nylon
Nylon has the characteristics of low friction coefficient and good corrosion resistance. Nylon is mostly used for ball valves and globe valves with temperature t≤90℃ and nominal pressure PN≤32MPa.

3. PTFE
Polytetrafluoroethylene is mostly used for stop valves, gate valves, ball valves, etc. with temperature t≤232℃ and nominal pressure PN≤6.4MPa.

4. Cast iron
Cast iron is used for gate valves, stop valves, cock valves, etc. for temperature t≤100℃, nominal pressure PN≤1.6MPa, gas, and oil.

5. Babbitt alloy
Babbitt alloy is used for ammonia stop valve with temperature t-70~150℃ and nominal pressure PN≤2.5MPa.

6. Copper alloy
Commonly used copper alloy materials include 6-6-3 tin bronze and 58-2-2 manganese brass. The copper alloy has good wear resistance and is suitable for water and steam with temperature t≤200℃ and nominal pressure PN≤1.6MPa. It is often used in gate valves, globe valves, check valves, plug valves, etc.

7. Chrome stainless steel
Commonly used grades of chromium stainless steel are 2Cr13 and 3Cr13 after quenching and tempering treatment, which has good corrosion resistance. It is commonly used on valves of water, steam, petroleum, and other media with temperature t≤450℃ and nominal pressure PN≤32MPa.

8. Chromium-nickel-titanium stainless steel
The commonly used grade of chromium-nickel-titanium stainless steel is 1Cr18Ni9ti, which has good corrosion resistance, erosion resistance, and heat resistance. It is suitable for steam, nitric acid, and other media with temperature t≤600℃ and nominal pressure PN≤6.4MPa, used in stop valves, ball valves, etc.

9. Nitrided steel
The commonly used grade of nitriding steel is 38CrMoAlA, which has good corrosion resistance and scratch resistance after carburizing treatment. Commonly used for power station gate valves with temperature t≤540℃ and nominal pressure PN≤10MPa.

10. Boronizing
Boronizing is directly processed from the valve body or valve clack body material to form the sealing surface, and then boronizing surface treatment, the sealing surface has good wear resistance. Used for power station blowdown valve.

When the valve is in use, the matters that should be paid attention to are as follows:
1. The sealing performance of the valve should be tested to ensure its performance.
2. Check whether the sealing surface of the valve is worn or not, and repair or replace it according to the situation.