+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 common standards and differences
American standard
ASME -- American Society of Mechanical Engineers
ANSI -- American National Standards Institute
API -- American Petroleum Institute
MSS SP -- American Valve and Fittings Manufacturers Standardization Association
British Standard -- BS
Japanese Industrial Standard -- JIS/JPI
German national standard -- DIN
French National Standard -- NF
General Purpose Valve Standard -- ASME B16.34 -- Flange End, Butt Weld End and Threaded End Valve
Gate valve standard:
API 600/ISO 10434 -- Oil and gas bolted steel gate valve
BS 1414 -- Steel gate valves for petroleum, petrochemical and refining industries
API 603 -- 150LB corrosion resistant flange end casting gate valve
GB/T 12234 -- Flange and butt weld connection steel gate valve
DIN 3352 -- Gate valve
SHELL SPE 77/103 -- According to ISO10434 steel gate valve
Globe valve standard:
BS 1873 -- Steel globe valves and stop check valves
GB/T 12235 -- Flange and butt weld connection steel shut-off valve and stop check valve
DIN 3356 -- Globe valve
SHELL SPE 77/103 -- BS1873 steel globe valve
Check valve standard:
BS 1868 -- Steel check valve
API 594 -- Wafer and double flange check valves
GB/T 12236 -- Steel swing check valve
SHELL SPE 77/104 -- BS1868 steel check valve
Ball valve standard:
API 6D/ISO 14313 -- Pipeline valve
API 608 -- Flange, threaded and butt welded steel ball valve
ISO 17292 -- Steel ball valves for petroleum, petrochemical and refining industries
BS 5351 -- Steel ball valve
GB/T 12237 -- Flange and butt welded steel ball valve
DIN 3357 -- Ball valve
SHELL SPE 77/100 -- BS5351 Ball Valve
SHELL SPE 77/130 -- according to ISO14313 flange end and butt weld end ball valve
Butterfly valve standard:
API 609 -- Wafer, lug and double flanged butterfly valves
MSS SP-67 -- Butterfly valve
MSS SP-68 -- High Pressure Eccentric Butterfly Valve
ISO 17292 -- Steel ball valves for petroleum, petrochemical and refining industries
GB/T 12238 -- Flange and clip connection butterfly valve
JB/T 8527 -- Metal sealing butterfly valve
SHELL SPE 77/106 -- API608/EN593/MSS SP67 Soft Seal Butterfly Valve
SHELL SPE 77/134 -- API608/EN593/MSS SP67/68 eccentric butterfly valve
Forged steel valve standard:
API 602 -- Flange end, threaded end, welded end and extended valve body connection end compact type gate valve
BS 5352/ISO15761 -- 50 mm and below steel gate valves, globe valves and check valves
SHELL SPE 77/101 -- According to ISO15761 steel gate valve, globe valve and check valve
Cryogenic valve standard:
BS 6364 -- Cryogenic valve
SHELL SPE 77/200 -- -50℃ valve
SHELL SPE 77/209 -- 0~-50℃ valve
Comparison of API, DIN, BS, GB structure:
API 600 and BS1414, BS1873, BS1868, BS5351 have the most detailed structural regulations for valves
DIN gate valve standard EN1984 does not specify the structure
The new version of GB/T12234 is based on the equivalent adoption of the API600 standard
Valve common connection form
FF --- Flat Face Flat Flange Connection (150LB commonly used)
RF --- Raised Face convex flange connection
RTJ --- Ring Joint groove connection (trapezoidal groove)
SW --- Socket welding
NPT --- NPT threaded connection
WAFER - - Clip-on connection
BW long type - - Butt-Welding butt joint long connection
BW short type - - Butt-Welding butt joint short connection
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.
The length of the EN 558-2 CLASS flanged valve is the same as ASME B16.10. Most DIN valve users are accustomed to using the F series structure length value in DIN3202.
Such as:
Gate: PN16-25---F5 series PN40-100--F7 series
Globe: PN10-40--F1 series PN63-160--F2 series
Check: PN10-40--F1 series PN63-160--F2 series
Ball: PN10-40 DN10-100--F4 series DN125-300--F5 series
Valve connection standard
ASME B16.10 -- Valve structural length
ASME B16.5 -- Steel flange and flanged fittings
ASME B16.47 -- Large diameter steel flange
MSS SP-44 -- Steel pipe flange
API 605 -- Compact Flange
ASME B16.25 -- Butt weld end
ASME B16.11 -- Socket and threaded end forged fittings
ASME B36.10 -- Welding and Seamless Steel Tubes
Flange comparison:
The old version of the DIN standard flange uses the DIN2501 standard (PN flange), the new version of the DIN standard uses the EN1092-1 PN flange, but can also include the CLASS flange.
The DIN2501 flange is basically identical to the GB flange and the HG European system flange.
DN15~50 The flanges of different pressures PN10~40 are the same.
The BS standard uses the BS 1560 CLASS flange in accordance with the ASME B16.5 flange, and the BS 4504 PN flange can also be used.
The API standard generally uses RF and RTJ flanges; DIN standard and GB general pressure
Seal material
Filler:
Formed graphite ring: -250~650℃
Flexible graphite with stainless steel wire: -250~650℃
Tetrafluoroethylene immersion graphite: -200~280℃
Low leakage graphite composite packing: -250~650℃
PTFE: -200~200℃
Middle cavity gasket:
PTFE board
Graphite plate
Strong graphite mat
Toothed pad
Graphite stainless steel winding mat
PTFE-containing stainless steel winding mat
RTJ metal pad
Pressure seal metal seal ring
O-ring:
NBR: -30~121℃
EPDM: -45~120℃
VITON A: -30~204℃
VITON B: -30~204℃
VITON AED: -30~204℃
HNBR: -30~180℃
Soft sealing seat:
PTFE: -200 ~ 200℃
PCTFE: -250 ~ 150℃
NYLON 1010: ~ 20℃
NYLON PA12: -50 ~ 120℃
DEVLON V: -100 ~ 150℃
PEEK: -100 ~ 260℃
Polyphenylene: ~ 400℃
Valve inspection standard
API 598 -- valve inspection and testing
ISO 5208 -- industrial valve pressure test
BS EN 12266-1 -- replaces BS6755-1 industrial valve pressure test
JB/T 9092 -- Inspection and test of valve
SHELL SPE77/302 -- General Valve Material, Inspection and Certification Requirements
SHELL SPE77/303 -- Special Service Condition Valve Material, Inspection and Certification Requirements