+86 138 8989 6699 
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 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...
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...
Ⅰ Business area: fluid control products, technology and environmental protection products. Ⅱ Advanced CNC machining centers, professional process ce...
RKS fluid was founded in 1997. We are a production workshop for both foundry and machining, research & development center, and quality inspection cent...
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
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
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.
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.
The manual valve is a valve operated by the handle and the hand wheel, and is a commonly used valve on the equipment pipeline.
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...
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 with bolted cover connection; made of ductile iron materials and with epoxy coating, designed as both clockwise and anti-c...
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 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
MINOTAUR series replaceable seat high performance butterfly valve
Valve foundation
1. The basic parameters of the valve are: nominal pressure PN, nominal diameter DN.
2. the basic function of the valve: cut off the medium, adjust the flow, change the flow direction.
3. the main way of valve connection: flange, thread, welding, butt.
4. the pressure of the valve - temperature grade means: different materials, different working temperatures, the maximum allowable non-impact working pressure is different.
5. There are two main systems for pipe flange standards: the European system and the American system.
The pipe flange connections of the two systems are completely different in size and cannot be matched.
It is most appropriate to distinguish by pressure level:
The European system is PN0.25, 0.6, 1.0, 1.6, 2.5, 4.0, 6.3, 10.0, 16.0, 25.0, 32.0, 40.0 MPa.
The US system is PN1.0 (CIass75), 2.0 (CIass150), 5.0 (CIass300), 11.0 (CIass600), 15.0 (CIass900), 26.0 (CIass1500), 42.0 (CIass2500) MPa.
The types of pipe flanges are: integral (IF), plate flat welding (PL), neck flat welding (SO), neck butt welding (WN), socket welding (SW), screw (Th), butt weld ring Loose sleeve (PJ/SE) / (LF / SE), flat welding ring loose (PJ / RJ) and flange cover (BL).
The flange sealing surface types mainly include: full plane (FF), convex surface (RF), concave (FM) convex (M) surface, tenon (T) groove (G) surface, ring connection surface (RJ), and the like.
Common (Universal) valve
1. Valve type code Z, J, L, Q, D, G, X, H, A, Y, S respectively:
gate valve, globe valve, throttle valve, ball valve, butterfly valve, diaphragm valve, plug valve, stop Return valve, safety valve, pressure reducing valve, steam trap.
2, The valve connection code 1, 2, 4, 6, 7 respectively:
1 - internal thread, 2 - external thread, 4 - flange, 6 - welding, 7 - clip.
3, The transmission mode of the valve code 9, 6, 3 respectively:
9 - electric, 6 - pneumatic, 3 - worm.
4, Valve body material code Z, K, Q, T, C, P, R, V respectively:
gray cast iron, malleable cast iron, ductile iron, copper and alloy, carbon steel, chrome-nickel stainless steel, chrome-nickel-molybdenum stainless steel, Chrome molybdenum vanadium steel.
5. Seat seal or lining code R, T, X, S, N, F, H, Y, J, M, W respectively:
austenitic stainless steel, copper alloy, rubber, plastic, nylon plastic, fluoroplastic, Cr-based stainless steel, hard alloy, rubber, Monel, valve body material.
6. Where the cast iron valve body is not suitable for use:
1) Water vapor or wet gas with a large water content.
2) Flammable and explosive fluids.
3) When the ambient temperature is lower than -20 °C.
4) Compressed gas.