Wholesale Single Flange Butterfly Valve - Durable & Efficient Flow Control Supplier, Manufacturers
Product Description
The single flange butterfly valve is a versatile, high-performance flow control component widely adopted in municipal water supply, drainage, HVAC systems, power engineering and general industrial pipeline systems. Differentiated from double-flange and wafer butterfly valves, this valve features a uniquely optimized structural design with one integral cast flange on the valve body and a wafer-style flat end on the opposite side. This distinctive configuration perfectly balances installation stability, space utilization and cost efficiency, making it a preferred solution for end-of-line pipeline mounting and limited-space working conditions.
Product Performance Specification
Technical Specifications
This series of single flange butterfly valves follows international and industrial standard dimensions, covering a complete size range from DN50 to DN1200 to meet diverse pipeline caliber requirements. It supports mainstream pressure ratings including PN10, PN16 and ANSI Class 150, which are applicable for most low and medium-pressure industrial and municipal pipeline working conditions. The valve adopts a full bore streamlined design, ensuring unobstructed fluid passage and minimal pressure loss during operation.
For material specifications, the valve body is optional with grey cast iron, ductile iron and stainless steel to adapt to different medium corrosiveness and environmental conditions. The valve disc is processed with precision polishing and anti-corrosion treatment, with optional materials of ductile iron with epoxy coating, 304 stainless steel and 316 stainless steel. The sealing components adopt high-quality EPDM, NBR and PTFE rubber materials, featuring high elasticity, ageing resistance and abrasion resistance, achieving ANSI Class VI zero-leakage sealing standard.
In terms of working parameters, the applicable medium temperature ranges from -20℃ to 120℃, adapting to conventional water, gas and mild chemical media. The valve can be configured with manual handle, worm gear, electric and pneumatic actuators to realize manual regulation and automatic remote control. All structural dimensions and installation parameters comply with ISO, GB and ANSI standard specifications, ensuring strong compatibility with standard pipeline flanges and convenient unified installation and maintenance.
Main Component Materials
| Component Name | Materials |
|---|---|
| Valve body | Ductile iron lined with rubber, Stainless steel lined with rubber, Carbon steel lined with rubber, copper lined with rubber, ductile iron lined with PTFE, stainless steel lined with PTFE, carbon steel lined with PTFE, copper lined with PTFE, etc |
| Shaft sleeve | Lubricating bronze, PTFE |
| Valve shaft | Stainless steel, carbon steel electroplating, alloy steel 17-4, 420 steel, 416 steel |
| Valve plate | Galvanized ductile iron plate, nylon coated ductile iron plate, Ductile iron lined PTFE plate, stainless steel plate, Dual phase steel plate, carbon steel plate, copper plate |
| Pin | Stainless steel, Monel alloy, Hastelloy alloy, etc |
| O ring | FPM, NBR |
Packaging & Delivery
Frequently Asked Questions
A single flange butterfly valve features an integral cast flange on one side and a wafer-style flat design on the opposite side. This optimized configuration provides enhanced bolt-securing strength compared to standard wafer types, while occupying significantly less space and weighing less than double-flange models.
Our single flange butterfly valves are engineered in standard dimensions covering DN50 to DN1200. They support standard operating pressure ratings including PN10, PN16, and ANSI Class 150, fitting most industrial and municipal pipelines.
The valve operates reliably within a medium temperature range of -20℃ to 120℃, making it suitable for water treatment, HVAC distribution, gas lines, and mild chemical pipeline environments.
Equipped with precision-engineered rubber seals (EPDM, NBR, or PTFE), the valve provides high elasticity and abrasion resistance, successfully achieving the ANSI Class VI zero-leakage sealing standard.
Yes. In addition to manual operation options (hand lever and worm gear), the valves can be directly configured with electric or pneumatic actuators for automated, remote pipeline flow control.
All mounting dimensions and flange configurations comply with international standards including ISO, GB, and ANSI, ensuring seamless compatibility with standard counter-flanges during replacement or new installations.
