API Β· ASME Β· DIN Β· EN standard industrial valves
Wafer Butterfly Valves
Wafer butterfly valves sandwich between the line flanges, giving pipeline isolation with the shortest face-to-face and lowest weight per diameter of the common shut-off choices. The range covers a stainless-body series at DN50 to DN2000, PN10 to PN40 / Class 150, with SS316L, carbon steel, cast iron or ductile iron body, aluminium-bronze-to-SS316 discs, SS410-through-nickel-copper alloy stems and EPDM/NBR/Viton/PTFE seat linings, operated by lever, gear or actuator. Design follows API 609 with API 609 / MSS SP-67 / SP-68 face-to-face and API 598 testing. Selection turns on seat lining versus temperature and medium, disc-stem pairing against corrosion, and whether lever handle remains practical at the line size.
Part of the Butterfly Valves family
Last updated: 2026-11
Family specifications
| size range | DN50 to DN2000 |
|---|---|
| pressure class | PN10 to PN40, Class 150 |
| seat materials | EPDM, NBR, Viton, PTFE |
| disc materials | Aluminium Bronze, Carbon Steel, Cast Iron, Ductile Iron, SS304, SS316 |
| stem materials | SS410, SS420, SS416, SS304, SS316, nickel-copper alloy |
| body materials | SS316L, Carbon Steel, Cast Iron, Ductile Iron |
| end connections | Wafer |
| operation | Lever Operated, Gear Operated, Electric Actuated, Pneumatic Actuated |
| design standards | API 609 |
| testing standards | API 598 |
| chih operation | Manual lever or worm gear operated |
| chih valve type | Resilient seated wafer type |
| chih connection type | Wafer type (installed between pipeline flanges) |
| chih body materials | Ductile iron |
| chih disc materials | Ductile iron / stainless steel |
| chih seat materials | EPDM (resilient) |
| chih size range | DN40 to DN1200 |
| chih pressure rating | PN10 / PN16 |
| chih design standard | EN 593 |
| chih actuator mounting | ISO 5211 mounting pad |
| chih face to face | EN 558 |
| chih working temperature | -10 deg C to 120 deg C (seat dependent) |
| chih suitable medium | Water, wastewater, air, cooling water |
| bvw size range | DN 40 - DN200 |
| bvw nominal pressure | PN10, PN16 / ASME 150# acc. to B16.5 |
| bvw design | DIN EN 593 |
| bvw certifications | CE-Marking, TA Luft, ATEX, WRAS |
| bvw marking | EN 19 |
| bvw face to face | DIN EN 558 line 20 / API 609 table 1 |
| bvw mounting flange | DIN EN ISO 5211 |
| bvw test | DIN EN 12266-1 leakage rate A bidirectional / API 598 / ISO 5208 category 3 |
| bvw body materials | EN-GJS-400-15 (EN 1563) |
| bvw disc materials | CF8M |
| bvw seat temperature nbr | -25 deg C to +100 deg C (NBR) |
| bvw seat temperature epdm | -35 deg C to +130 deg C (EPDM) |
| bvw seat temperature fkm | -20 deg C to +200 deg C (FKM) |
| ecw size range | DN50 to DN1200 |
| ecw pressure class | PN10, PN16, Class 150, Class 300 |
| ecw operating temperature | -30 deg C to 135 deg C |
| ecw design manufacture | API 609, ANSI 16.34, JIS B2064, GB/T 12238 |
| ecw inspection test | API 598 |
| ecw face to face | API 609, DIN 3202, ISO 5752, BS 5155 |
| ecw flange dimension | DIN 2501 PN10/16, ANSI 125/150/300, BS 4504, JIS 10K |
| ecw mounting | ISO 5211 |
| tmw1120 design | Resilient seated, centric wafer-type butterfly valve to DIN-EN 593 |
| tmw1120 service temperature | Drinking and service water up to 100 deg C |
| tmw1120 operating pressure | 150 PSI, PN6, PN10, PN16 |
| tmw1120 flange connection | ANSI CL 150, JIS 5K, PN6, PN10, PN16 |
| tmw1120 top flange | ISO 5211 |
| tmw1120 marking | EN 19 |
| tmw1120 face to face | DIN EN 558-1, basic series 20 (DIN 3202, series K1) |
| tmw1120 test standard | EN 12266-1, leak-rate A, tight in both flow directions |
| tmw1120 body materials | Cast iron GG25, from DN700 ductile cast iron GGG40/50 |
| tmw1120 disc materials | Ductile cast iron GGG50 |
| tmw1120 sleeve | EPDM (replaceable rubber sleeve with integrated seal) |
| tmw1120 shaft materials | Stainless steel 1.4021, anti-blowout |
| tmw1120 shaft bearings | Maintenance-free shaft bearings |
| tmw1120 certification | EN 10204 3.1 |
| tmw1120 coating | Body internally and externally epoxy coated, coating thickness over 250 um, blue RAL 5010 |
| tmw1320 design variant | Wafer PTFE seated butterfly valve for services where standard elastomers are not suitable (chemical, pharmaceutical, food) |
| tmw1320 body design | Two piece body design with elastomer backing |
| tmw1320 disc options | Stainless steel disc standard (type 1320), 3mm PTFE coated disc optional (type 1321) |
| tmw1320 operating pressure | PN6, PN10 |
| tmw1320 flange connection | ANSI CL150, PN6, PN10, PN16 |
| tmw1320 top flange | ISO 5211 |
| tmw1320 marking | EN 19 |
| tmw1320 face to face | EN 558-1/20 |
| tmw1320 test standard | EN 12266-1 |
| tmw1120 size range | DN40 - DN800 (1,5" - 32") |
| tmw1320 size range | DN40 - DN800 (1,5" - 32") |
Ordering & documentation
Documents
Ask for the documentation set with the inquiry β typical items (material certificates, test reports to the listed inspection standard, dimensional drawings) are confirmed and supplied with the quotation.
Quotation
Send the medium, temperature, pressure, size and connection for a quotation-ready inquiry. Lead time, MOQ and price are confirmed at quotation, together with the documents to be supplied with the order.
Sample & supply
Supply terms, order quantities and lead time are agreed per order β state the destination country and required schedule with the inquiry.
Storage & shipping
Store valves with seats and seals protected from UV, ozone and deformation, and keep end-face protectors on until installation; storage limits and shipping arrangements for the selected materials are confirmed at quotation.
Frequently asked questions
What standards govern the design and testing of wafer butterfly valves?
The published specification for this family lists API 609 as the design standards. Testing follows API 598.
What sizes and pressure ratings are available for wafer butterfly valves?
The published size range is DN50 to DN2000, and the published pressure ratings are PN10 to PN40, Class 150. Availability of a specific size and rating is confirmed at quotation.
What materials are wafer butterfly valves available in?
The published specification lists body materials: SS316L, Carbon Steel, Cast Iron, Ductile Iron. Material availability for a specific size and rating is confirmed at quotation.
What end connections do wafer butterfly valves support?
The published specification lists Wafer as the available end connections. The connection for a specific size is confirmed at quotation.
What should a quotation inquiry for wafer butterfly valves include?
The governing standard and class, nominal size, body and seat materials, the service medium with temperature, and the destination β anything missing is confirmed during quotation.
Knowledge: selection guides
More in this family
Models & executions in this subtype
Model
SS316L Wafer Butterfly Valves
SS316L wafer butterfly valves are the low-carbon stainless execution of the wafer pattern: the valve clamps between flanges, giving a compact, light isolating a
View specifications βModel
PTFE Lined Wafer Butterfly Valves
PTFE lined wafer butterfly valves carry a PTFE sealing route (CF8 + PTFE seat) inside a wafer body, so the wetted surface resists the acids, alkalis and solvent
View specifications βModel
Duplex Wafer Butterfly Valves
A wafer-body butterfly valve on the duplex material axis: Duplex 4A/5A and super-duplex body options with SS316 shaft and stem, elastomer seats (EPDM/NBR/Viton)
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