PRODUCT

Cast iron PN16 wafer end butterfly valve butterfly wafer type

Product Attributes :

Specifications:

Size: DN25-DN1200/1.5"-48"

Pressure: PN10/PN16/25/150LB

Design standard : API609 ,BS EN593.MSS SP-67 BS5155

Standard: Flange: DIN3202, DIN2501 PN10/PN16

Face to face:API609, ISO5752,BS EN558, BS5155,

MS SP-67,DIN3202

Product Description

Wafer Type Butterfly Valve

The wafer type butterfly valve is a compact quarter-turn valve designed for on-off service and flow regulation in water, oil and compatible gas pipeline systems. Its short face-to-face design makes it suitable for installations where space and weight are important considerations.

MSS SP-67 API 609 EN 593 ISO 5752 Series 20

Quick Specifications

Size: DN50-DN1200 (2 inch to 48 inch)

Pressure Rating: PN10 / PN16 / PN25, Class 125 / 150

Body Options: Ductile Iron, CF8, CF8M, WCB, Bronze

Seat Options: NBR, EPDM, PTFE, PFA, Viton

Operation: Lever, Worm Gear, Electric Actuator, Pneumatic Actuator

Temperature: 0-120°C, depending on seat material and service conditions

Typical Media: Water, oil and compatible gas

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Wafer Type Butterfly Valve Overview

A wafer type butterfly valve is installed between two pipeline flanges and secured with flange bolts. The valve features a compact body, a rotating disc, a stem and a resilient seat. When the stem turns the disc by 90 degrees, the valve moves between the fully open and fully closed positions.

Compared with many other valve designs, the wafer butterfly valve has a short face-to-face dimension and a relatively lightweight construction. This helps reduce installation space and makes the valve a practical choice for water distribution, HVAC, industrial circulation and other pipeline systems. Depending on the selected disc, seat and body materials, it can be configured for different operating media and service conditions.

The resilient seat provides shut-off performance when the valve is correctly selected, installed and operated within its specified pressure, temperature and media limits. The quarter-turn operating mechanism also allows convenient manual operation or integration with an electric or pneumatic actuator.

Key Features and Advantages

Compact Wafer Design

The short face-to-face structure fits between pipeline flanges, helping save installation space and reduce overall pipeline weight.

Resilient Seat Sealing

A resilient seat is designed to provide dependable shut-off. Seat material and sealing performance can be selected according to the working medium and operating conditions.

Quarter-Turn Operation

The 90-degree operating mechanism supports quick opening and closing. Lever, worm gear, electric and pneumatic operation are available as configuration options.

Multiple Material Options

Body, disc, stem and seat materials can be selected to suit the required corrosion resistance, temperature range and media compatibility.

Simple Installation

The wafer body is fitted between matching pipeline flanges. Its compact structure is useful for new installations and replacement projects with limited space.

Manual or Automated Control

Choose a lever or worm gear for manual operation, or an electric or pneumatic actuator for remote operation and automated process control.

Wafer Butterfly Valve Construction and Working Principle

The main components of a wafer type butterfly valve include the valve body, disc, stem, resilient seat and operating device. The body is installed between two pipe flanges, while the stem connects the operating device to the disc.

Valve opening: Turning the lever, gearbox or actuator rotates the disc away from the closed position. As the disc turns toward the direction of flow, the passage opens and the medium can pass through the pipeline.

Valve closing: Turning the stem in the opposite direction rotates the disc back across the flow passage. The disc contacts the resilient seat to shut off the pipeline, subject to the valve's rated operating conditions.

Flow regulation: The disc can also be positioned between fully open and fully closed positions to regulate flow where the application and valve sizing are suitable for throttling service.

Wafer Type Butterfly Valve Technical Specifications

Technical data for wafer type butterfly valves. Final specifications depend on the selected model and configuration.
Item	Specification
Valve Type	Wafer Type Butterfly Valve (Concentric / Center Plate Design)
Nominal Size	DN50-DN1200 (2 inch to 48 inch)
Pressure Rating	PN10 / PN16 / PN25; Class 125 / 150
Body Material	Ductile Iron, CF8, CF8M, WCB, Bronze
Disc Material	Ductile Iron, CF8, CF8M, WCB, Bronze
Stem Material	SS420 / SS410 / F6A
Seat Material	NBR / EPDM / PTFE / PFA / Viton
Typical Medium	Water, oil and compatible gas
Temperature Range	0-120°C, depending on seat material and service conditions
Operation	Lever / Worm Gear / Electric Actuator / Pneumatic Actuator
Face-to-Face	ISO 5752 Series 20 / API 609 / BS 5155
Testing	API 598, where specified for the ordered configuration

Note: The pressure-temperature rating, material compatibility and permitted media should be confirmed against the product datasheet before ordering.

Applicable Design, Connection and Testing Standards

Referenced standards for design, flange connection and testing of wafer butterfly valves.
Category	Standard Family	Referenced Standard
Design and Manufacture	MSS	SP-67
Design and Manufacture	API	609
Design and Manufacture	EN	593
Flange Connection	DIN	PN10 / PN16 / PN25
Flange Connection	ANSI	B16.1 Class 125 / Class 150
Flange Connection	BS	4504 PN10 / PN16
Flange Connection	ISO	PN10 / PN16
Flange Connection	JIS	B2212 / B2213
Flange Connection	BS 10	Table D / Table E
Face-to-Face Dimensions	ISO	5752 Series 20
Face-to-Face Dimensions	API	609
Face-to-Face Dimensions	BS	5155
Testing and Inspection	API	598, where specified

Standards and dimensional requirements should be confirmed for each order. Please provide the required flange standard, pressure class and face-to-face dimension when requesting a quotation.

Wafer Type Butterfly Valve Applications

Wafer butterfly valves are used in pipeline systems that require compact shut-off or flow regulation. The correct valve body, disc and seat materials should be selected according to the medium, temperature, pressure and installation environment.

Water Supply and Wastewater Treatment

Suitable for water intake, water distribution, pump stations, filtration lines and wastewater treatment process piping when the selected materials meet the service requirements.

Wafer type butterfly valve for HVAC chilled water and cooling water systems

HVAC and Building Services

Used in chilled-water circulation, cooling-water distribution, air-conditioning plant rooms and building service pipelines where a compact valve is required.

Wafer butterfly valve for industrial oil and gas utility pipelines

Oil and Gas Utility Lines

Can be configured for compatible oil, fuel and utility services by selecting suitable body, disc and seat materials for the actual operating conditions.

Wafer butterfly valve for marine and general industrial cooling water systems

Marine and General Industry

Potential applications include ballast and cooling-water lines, industrial water circulation, paper mills and utility systems. Material suitability should be checked for seawater or corrosive media.

Fire Protection Systems

Commonly considered for fire main, sprinkler and hydrant branch lines where a compact isolation valve is required. Confirm the applicable listing or approval requirement for the project.

Power Plants and Cooling Circuits

Used in circulating water, auxiliary cooling and service water lines. Larger sizes are usually supplied with a worm gear or actuator to reduce operating torque at the handle.

Irrigation and Agriculture

Suitable for irrigation mains, pumping stations and water transfer lines where lightweight valves and short installation lengths help reduce pipeline cost.

Wafer Butterfly Valve Operation Options

TWIV wafer type butterfly valves can be configured with different operating devices to match pipeline size, operating frequency and control requirements.

Lever Operated

A straightforward manual option for smaller sizes and applications where local operation is sufficient.

Worm Gear Operated

A gearbox assists manual operation and is commonly selected when larger valve sizes require increased operating leverage.

Electric or Pneumatic Actuated

Actuator configurations support remote operation and integration into automated pipeline or process-control systems. Actuator sizing depends on valve torque and service conditions.

Wafer Butterfly Valve Size and Operation Selection Guide

The table below is a general reference for selecting an operating device by nominal size. Final selection depends on line pressure, flow velocity, operating frequency and available installation space.

General guidance only. Confirm the operating device with the valve supplier before ordering.
Nominal Size	Typical Operating Device	Typical Service
DN50-DN150	Lever	Manual isolation, branch lines, small distribution pipes
DN200-DN300	Worm Gear or Lever	Main distribution lines, plant rooms, pump discharge
DN350-DN600	Worm Gear	Transmission mains, cooling water headers
DN700-DN1200	Worm Gear or Actuator	Large transmission lines, treatment plants, power plant cooling

Frequently Asked Questions About Wafer Type Butterfly Valves

What is a wafer type butterfly valve?

A wafer type butterfly valve is a quarter-turn valve installed between two pipeline flanges. Its compact body is clamped in place by the flange bolting arrangement, making it a space-saving option for many water and industrial pipeline systems.

What is the difference between wafer type and lug type butterfly valves?

A wafer type butterfly valve is generally held between two mating pipe flanges using the specified bolting arrangement. A lug type butterfly valve has threaded or tapped lugs around the body. The appropriate design depends on the pipeline layout, installation requirements and whether dead-end service is required.

How do I select the seat material?

Seat selection depends on the medium, temperature, pressure and chemical compatibility. EPDM is commonly considered for water service, while NBR is often used for compatible oil applications. PTFE, PFA and Viton may be considered for other chemical or temperature requirements. Confirm the selection with the valve supplier for the actual operating conditions.

What pressure rating is available?

Standard configurations are offered in PN10, PN16 and PN25, as well as Class 125 and Class 150. The actual pressure-temperature rating depends on the body and seat material selected, so the product datasheet should be checked for the specific configuration.

Can a wafer butterfly valve be used for throttling?

The disc can be positioned at intermediate angles for flow regulation where the application and valve sizing suit throttling service. Continuous operation at small opening angles can increase disc wear and cavitation risk, so the duty conditions should be reviewed with the supplier.

Can a wafer butterfly valve be supplied with an actuator?

Yes. Depending on the valve size and configuration, the valve can be supplied with a lever, worm gearbox, electric actuator or pneumatic actuator. Please specify the required power supply or pneumatic conditions and control function when making an inquiry.

What information is needed for a wafer butterfly valve quotation?

Please provide the nominal size, pressure rating, flange standard, body and disc materials, seat material, operating medium, temperature, operation type and required quantity. A datasheet or pipeline specification is also helpful for confirming the correct configuration.

Wafer Type Butterfly Valve Manufacturer and Supplier

Tianjin TWIV Fluid Valve supplies industrial butterfly valves for water treatment, HVAC, general industrial and other pipeline applications. Wafer type butterfly valve configurations can be discussed according to required size, pressure rating, materials, seat type and operation method.

When contacting us, please share your technical requirements and application details. Our team can help review the valve configuration and provide product information for your project.

Related Butterfly Valve Products

Lug Type Butterfly Valve | Flanged Butterfly Valve | Double Flange Butterfly Valve | Electric Butterfly Valve | Pneumatic Butterfly Valve

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