Standard Lever Operated Wafer Butterfly Valve

Overview

The Standard Lever Operated Wafer Butterfly Valve is a practical, cost-effective solution for on-off control and basic flow regulation in water supply, drainage, HVAC, irrigation and general industrial piping systems.

The valve combines a compact wafer body, resilient rubber seat and simple manual lever operation. Its mature, widely used design balances everyday operating needs with purchasing budgets, making it a practical choice for routine projects and customers seeking good value.

Its familiar construction, commonly used component options and convenient installation make it especially suitable for distributors, importers and project suppliers looking to introduce a competitive butterfly valve into their local market, expand an existing product range or respond quickly to price-sensitive enquiries.

Product Details
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Product Features

● Wafer-Type Body: Compact construction installs between mating flanges and helps reduce installation space and system weight.
● Resilient Rubber Seat: Provides dependable shut-off for compatible media under the specified pressure and temperature conditions.
● Manual Lever Operation: Offers quick quarter-turn opening and closing without electric or pneumatic power.
● Position Indication: The handle position gives a clear visual indication of the disc position.
● Multi-Position Control: The notched locking plate allows the disc to be held at different opening positions for basic flow adjustment.
● Centric Disc Design: A straightforward, proven structure supports stable operation and convenient maintenance.
● Replaceable Component Options: Different body, disc, stem and seat combinations are available to suit project and market requirements.
● Bidirectional Shut-Off: The resilient-seated centric construction can provide shut-off in either flow direction when correctly selected and installed.

Market Positioning

● Standard Series: DINGLIU offers Standard and Premium butterfly valve series. This Standard Series focuses on cost-effective selection for common pipeline applications and local distribution.
● Cost-Effective Standard Configuration: A mature and widely used structure helps control procurement cost and provides an attractive price-to-performance balance.
● Suitable for Local Market Development: The familiar product form is easy for distributors and end users to understand, specify and promote.
● Flexible Product Selection: Body, disc, stem and seat materials can be selected for different media and market requirements.
● Convenient for Range Expansion: Suitable for adding a competitively positioned manual butterfly valve to an existing valve portfolio.
● Practical for Regular Enquiries: Covers common water and utility applications without unnecessary structural complexity.
● Private-Label Friendly: Product marking, nameplate, handle colour and packaging can be discussed according to order requirements.

Cost and Commercial Advantages

● Competitive Purchasing Cost: Common configurations and practical material options help customers balance their required specifications with their purchasing budget.
● Balanced Performance and Budget: Focuses on the core functions required in ordinary water and utility systems, making it suitable for cost-sensitive projects.
● Broad Market Familiarity: Conventional appearance and operating method help shorten product introduction and customer acceptance time.
● Simplified Stock Planning: Common specifications and material combinations make it easier for distributors to build a practical local product range.
● Easy Installation and Replacement: The compact wafer connection is widely used and can be installed between compatible pipeline flanges.
● Flexible Branding Options: Suitable for wholesalers, distributors and OEM customers developing their own regional product offering.

This product is positioned as an economical general-purpose option. Final selection should still be based on the medium, working pressure, temperature, flange standard and installation conditions.

Technical Specifications

Typical Size Range

● NPS 2″–8″
● DN50–DN200

Lever operation is generally used for small and medium sizes. Other sizes or operating methods can be discussed according to the required operating torque and application.

Pressure Rating

● PN10 / PN16

The applicable pressure rating depends on the selected body, seat, disc, stem and mating flange configuration.

Available Material Options

Component	Common Material Options
Body	Cast iron, ductile iron or other materials upon technical confirmation
Disc	Ductile iron with coating, stainless steel, aluminium bronze or other suitable materials
Stem	Stainless steel, 17-4PH stainless steel or equivalent corrosion-resistant high-strength material
Seat	EPDM, NBR, silicone rubber or other elastomers compatible with the service medium
Handle	Ductile iron, aluminium alloy or other standard handle configurations

Material combinations shall be selected according to the medium, working pressure, operating temperature and local market requirements. Special materials are subject to technical confirmation.

Standards

International Standards

● Design: EN 593, where specified
● Face-to-Face Dimension: EN 558 Series 20 / API 609 Category A, as applicable
● Inspection and Pressure Testing: EN 12266-1 / API 598, as specified
● Flange Compatibility: EN 1092-2 or ASME B16.5 Class 150 flange systems, subject to the selected body configuration

Chinese Standards

● Design and Manufacture: GB/T 12238-2008 — Flanged and Wafer Resilient-Seated Butterfly Valves
● Face-to-Face Dimension: GB/T 12221-2025 — Metal Valves, Face-to-Face and Related Dimensions, where applicable
● Inspection and Pressure Testing: GB/T 13927-2022 — Industrial Valves, Pressure Testing

International and Chinese standards represent alternative order or project requirements and are not automatically applied simultaneously. The applicable standard, flange compatibility and inspection requirements shall be stated in the purchase order. Special requirements can be discussed with the factory.

Industry Applications

● Water supply and distribution
● Building services and HVAC systems
● Drainage and wastewater pipelines
● Agricultural irrigation
● Water treatment facilities
● Fire-water auxiliary pipelines, subject to project requirements
● General industrial water systems
● Other compatible non-corrosive or mildly corrosive fluid services

Suitability for drinking water, seawater, oil, gas, chemicals, high-temperature media or fire-protection systems must be confirmed according to the selected materials and any required approvals.

Recommended Customers

● Valve distributors and wholesalers
● Importers developing competitively priced product lines
● OEM and private-label customers
● Building-services and HVAC suppliers
● Irrigation and water-system contractors
● Project suppliers serving price-sensitive tenders and routine maintenance demand

Ordering Information

For accurate selection and quotation, please provide the valve size, pressure rating, flange standard, body and disc materials, stem material, seat material, medium, working pressure, operating temperature, quantity, marking and packaging requirements.