PRODUCT

3 inch cast iron wafer type butterfly valve lever

3 inch cast iron wafer type butterfly valve lever

Product Attributes :

Size: DN40-DN1200

Pressure: PN10/PN16

Standard: Flange: DIN3202, DIN2501 PN10/PN16

Face to face: BS5155,Top Flange: ISO5211

Product Description

Cast Iron Wafer Type Butterfly Valve – DN50 to DN1200, PN10 / PN16

A space-saving wafer butterfly valve with a cast iron body and slim face-to-face dimension, clamped between two pipe flanges with through-bolts. Quarter-turn operation by lever, worm gear, pneumatic or electric actuator — built for water, sewage, sea water, air and general industrial service.

DN50 – DN1200
1.0 / 1.6 MPa
Max. 150°C
API 609 / EN 593

Request a Quote View Specifications

Factory-direct supply · 100% shell and seal tested to API 598 · OEM nameplate, custom seat compound and actuator mounting available.

Cast iron wafer type butterfly valve DN50 to DN1200 with lever operator

Cast iron wafer butterfly valve, PN10 / PN16, lever operated

DN50 – DN1200

2" to 48" nominal size

1.0 / 1.6 MPa

PN10 and PN16 rating

150°C

Maximum service temperature

API 598

Shell and seal tested

Key Features at a Glance

Ultra-Slim Body

The wafer design occupies only the space between two flanges, so it fits into tight plant rooms, skids and retrofits where a flanged valve will not go — and it weighs and costs less.

Self-Energising Seal

Sealing force increases as the disc closes against the resilient seat, giving reliable shutoff that improves with pressure rather than degrading.

Frame-Type Disc

The cast frame disc combines high mechanical strength with a large flow area, keeping pressure drop and pumping energy low.

Bi-Directional Installation

Seals in both flow directions and is not affected by pipeline orientation, so the valve can be fitted in almost any position without regard to flow arrow.

Specifications

Nominal pressure	1.0 MPa (PN10) / 1.6 MPa (PN16)
Nominal diameter	DN50 – DN1200 (2" – 48")
Shell test pressure	1.5 MPa (PN10) / 2.4 MPa (PN16)
Seal test pressure	1.1 MPa (PN10) / 1.76 MPa (PN16)
Applicable temperature	Up to 150°C, depending on seat compound and line pressure
Applicable medium	Water, sewage, sea water, air, vapour, food, medicine, oils, acids, alkalis and similar media compatible with the selected seat material
Operating mode	Manual lever, worm gear, pneumatic actuator, electric actuator
Body type	Wafer (clamped between flanges by through-bolts), centre-line disc, 90° quarter-turn
Body material	Cast iron (standard); ductile iron, carbon steel, stainless steel and aluminium bronze on request
Disc / stem	Al-bronze, CF8M, ductile iron or WCB disc; carbon steel, SS304 or SS316 stem
Seat / O-ring	EPDM, PTFE, Buna-N (NBR), Hypalon
Face to face	API 609 / ISO 5752 series 20 / BS 5155
Test & inspection	API 598
Surface treatment	Fully painted body, internal and external, for rust prevention; epoxy coating available

Test pressures correspond to 1.5 times the nominal pressure for the shell test and 1.1 times for the seal test. Please confirm the medium, concentration and working temperature before ordering.

Product Description and Construction Features

The cast iron wafer type butterfly valve is a double-headed bolt connecting the valve between two pipe flanges. It has a simple structure and consists of only a few parts. The valve only needs to be rotated 90° to complete the opening and closing, so operation is simple and the wafer butterfly valve has good fluid control characteristics.

Simple, light lever operation. The lever is compact in structure, flexible, labour-saving and convenient to use, with a notch plate that holds the disc at intermediate positions for throttling.
Reliable, self-tightening seal. The wafer-type butterfly valve has a sealing function that becomes tighter the closer it is closed, so sealing performance is reliable over the whole service life.
High-strength frame disc. The butterfly plate uses a frame structure with high strength, a large flow area and small flow resistance, keeping head loss and energy consumption low.
Fully painted, corrosion protected. The entire wafer butterfly valve is painted to effectively prevent rust, and the same body can serve different media simply by changing the seat material.
Bi-directional sealing. The valve has a two-way sealing function; when installed it is not controlled by the flow direction of the medium and is not affected by spatial position, so it can be installed in most directions.

Wafer Butterfly Valve vs Flange End Butterfly Valve

Both share the same quarter-turn, centre-line working principle. The difference is how the valve is held in the pipeline — and that decides which one suits your project.

Item	Wafer type (this page)	Flange end / double flange
Installation	Clamped between two flanges by long through-bolts	Bolted to each pipe flange with its own flange
Face-to-face length	Very short — saves space and weight	Longer body, heavier, higher cost
Pipeline rigidity	Lower; the flange joint carries the load	High; valve acts as part of the pipe spool
Removal for service	Pipeline must be spread or a dismantling joint used	Can be unbolted and lifted out directly
End-of-line duty	Not recommended without downstream support	Suitable — downstream flange supports the disc load
Typical use	HVAC, water treatment, skids, compact plant rooms, cost-sensitive projects	Buried mains, pump stations, high pressure, end-of-line discharge

Typical Applications and Use Cases

The cast iron wafer butterfly valve is the default isolation valve wherever installation space is tight, the line is indoors and the medium is compatible with a resilient seat. Typical service conditions include:

HVAC & Building Services

Chilled water, condenser water and hot water risers in plant rooms and ceiling voids, where the short face-to-face length fits between tight flange pairs.

Water Supply & Treatment

Filtration, dosing, backwash and distribution pipework in water works and wastewater plants, including sludge and aeration lines.

Fire Protection

Sprinkler and hydrant mains, pump suction and discharge headers where a lightweight, fast-operating isolation valve is required.

Chemical Processing

Dilute acid, alkali, brine and solvent lines using PTFE or Hypalon seats, with CF8M disc and SS316 stem for corrosive duty.

Marine & Shipbuilding

Ballast, bilge, cooling water and sanitary systems, where compact size and low weight are decisive on board.

Food & Beverage

Process water, CIP and product lines with food-grade EPDM seats, polished disc and a fully painted or stainless body.

Power & Utilities

Cooling water, service water, ash handling and compressed air systems in thermal, biomass and waste-to-energy plants.

Irrigation & Agriculture

Main lines, pump outlets and filtration stations, where a low-cost, corrosion-protected valve with a long service life is preferred.

Materials of Construction

No.	Part Name	Material
1	Body	Cast iron (standard) / carbon steel / stainless steel / ductile iron / Al-bronze
2	Disc	Al-bronze / CF8M / ductile iron / WCB
3	Seat	EPDM / PTFE / Buna-N / NBR / Hypalon
4	Stem	Carbon steel / stainless steel 304 / stainless steel 316
5	Bushing	PTFE / self-lubricating
6	O-ring	EPDM / PTFE / Buna-N / NBR / Hypalon
7	Pin	SS316 / SS416 / SS304

For sea water and chloride-rich media we recommend an Al-bronze or CF8M disc with an SS316 stem; the cast iron body should be epoxy coated and, for permanent immersion, replaced by ductile iron or stainless steel.

Design, Connection and Testing Standards

Design & Manufacture	Flange Connection	Face to Face Dimension	Test & Inspection
MSS SP-67 API 609 EN 593	DIN PN10/16/25; ANSI B16.1 BS 4504; ISO PN10/16 JIS B2212/2213 BS 10 Table D; BS 10 Table E	API 609 ISO 5752 series 20 BS 5155	API 598

Size Range and Recommended Actuation

Size range	PN10 (1.0 MPa)	PN16 (1.6 MPa)	Recommended operation
DN50 – DN150	Available	Available	Hand lever (standard), pneumatic actuator
DN200 – DN300	Available	Available	Lever or worm gearbox; electric actuator for modulating duty
DN350 – DN600	Available	Available	Worm gearbox standard; electric or pneumatic actuation
DN700 – DN1200	Available	Available	Worm gearbox with handwheel; electric actuator recommended

Above DN350 the valve should be supported independently so that pipe load is not carried by the flange joint.

Installation and Maintenance Notes

Installation

Check that flange drilling, bolt circle and face-to-face length match the ordered standard before fitting.
Use through-bolts (studs) long enough to pass both flanges and the valve body; the bolt count follows the pipe flange standard.
Gaskets are normally unnecessary because the resilient seat covers the flange face — add them only if the seat does not reach the bolt circle.
Install with the disc slightly open, and make sure the disc swings into the free pipe bore, never into a reducer, elbow or weld bead.
Do not use the wafer valve as the final valve on an unsupported pipe end.
Leave clearance for the lever arc or actuator, and allow space for future seat replacement.

Maintenance

Cycle the valve a few times each quarter to prevent deposits locking the disc.
Inspect the seat for swelling or hardening when the medium changes.
Seat and O-ring are replaceable without special tools; keep a spare kit for critical lines.
Re-torque flange bolts evenly after the first thermal cycle.
Do not weld or apply heat near the installed valve; the resilient seat is heat sensitive.

Product Show

Cast iron wafer type butterfly valve PN10 PN16 for water and HVAC pipelines

Cast iron wafer butterfly valve with fully painted body

Wafer butterfly valve with lever handle, DN50 to DN300, factory supply

Lever operated wafer butterfly valve, notch plate for throttling

Frequently Asked Questions

Should I choose a wafer or a flanged butterfly valve?

Choose wafer when space and cost matter, the line is indoors, and the pipeline can be spread for maintenance. Choose the flange end version for buried mains, end-of-line discharge, high pressure or anywhere the valve must be removed without dismantling the pipe. Both are available from the same production line, so you can mix them in one project.

Do wafer butterfly valves need gaskets?

Generally no. On a resilient seated wafer valve the rubber seat extends over the flange face and acts as the gasket, sealing directly against both pipe flanges. Gaskets are only added when the seat does not cover the full flange face, or when the mating flange is damaged or of a non-standard profile.

Can the valve be installed at the end of a pipe?

A wafer valve is clamped by the two flanges, so at an unsupported pipe end there is nothing to react the disc load. For end-of-line or dead-end service, specify a flange end (double flange) butterfly valve, or add a blind flange and adequate pipe support.

What pressure and temperature can it handle?

PN10 (1.0 MPa) and PN16 (1.6 MPa) as standard, shell tested at 1.5 and 2.4 MPa respectively, and seal tested at 1.1 and 1.76 MPa. Maximum service temperature is 150°C, but pressure must be derated as temperature rises — send us the duty point and we will confirm the seat compound.

Is a cast iron body suitable for sea water?

For intermittent sea water service, an epoxy-coated cast iron body with an Al-bronze disc and SS316 stem performs well. For continuous or immersed sea water duty we recommend a ductile iron or stainless steel body, since graphitic corrosion of grey cast iron is a real risk in chlorides.

Can you supply actuated valves and OEM branding?

Yes. Pneumatic (double-acting or spring-return) and electric (on/off or 4-20 mA modulating) actuated assemblies are supplied factory mounted and tested. OEM service includes custom nameplate, customer colour, private-label packaging and special flange drilling. Typical lead time is 15–25 days for standard sizes.

Packing, Delivery and Service

Packing

Plastic caps protect both sealing faces
Plywood case or export pallet, seaworthy packing
VCI film and desiccant for long sea transit
Shipping marks per customer instruction

Service

Data sheet and drawing confirmation before production
Pre-shipment photos and API 598 test report
Spare seat, O-ring and bushing kits
Support on flange matching, torque and actuator sizing

Need a cast iron wafer butterfly valve quotation?

Send us the size, pressure rating, medium, working temperature and required flange standard. We will confirm the body and seat materials, recommend the actuator, and reply with a formal quotation within one working day.

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