Slim, lightweight plastic butterfly valves that clamp between pipe flanges, the lowest-cost and most compact way to isolate a plastic pipeline.
Ningbo Baodi Plastic Valve Co., Ltd. traces its origins back to 1979, with its predecessors being Zhenhai Chemical Valve Factory and Beilun Plastic Valve Factory. The company is one of the earliest Wafer Style Plastic Butterfly Valves Manufacturers and Custom Wafer Style Plastic Butterfly Valves Factory in China to design and produce industrial plastic valves and receive acceptance from the Ministry of Chemical Industry. In 1979, the company manufactured its first plastic diaphragm valve, which passed the technical appraisal of the Ministry of Chemical Industry in 1983. In 1992, the company invented the one-piece flange ball valve, a structural design that has since become the most widely used plastic valve product in chemical-related industries. The development history of the company and its predecessors also represents an important chapter in the application of plastic valves in China's industrial production.
In 2006, the company expanded its product line to cover industrial plastic pipes and fittings, becoming one of the first domestic enterprises to apply CPVC material in the production of industrial-grade piping valves. Over more than 40 years since its establishment, the company has designed and manufactured various plastic valves for the most demanding industries. It has served tens of thousands of enterprises both domestically and internationally, exporting to more than 60 countries, and has consistently remained a leading manufacturer of industrial thermoplastic valves and piping systems. Our professional service and stable quality have always been well received and recognized by customers.
Baodi ranks among the global leaders in the number of product categories, capable of fully covering industrial plastic pipe and valve requirements. The company has obtained ISO 9001, ISO 14001, and ISO 45001 system certifications, as well as the national special equipment pressure piping component manufacturing license. It is recognized as a National High-Tech Enterprise and a Ningbo City Specialized and Sophisticated Enterprise. Baodi is a principal drafter of the national standard for plastic diaphragm valves and the chemical industry standards for plastic diaphragm valves, plastic ball valves, and plastic check valves.
Design Idea
2D Drawing
3D Modeling
Mold Fabrication
Prototype Testing
Full-scale production
Wafer style plastic butterfly valves have a thin ring body with no flanges of their own. The valve is clamped between two pipe flanges by the flange bolts, which pass around the outside of the body, and the elastomer liner wraps over the body faces to serve as the gasket. The result is the shortest, lightest, and least expensive butterfly valve configuration, with face-to-face lengths set by standard dimensions.
Because the wafer body is held in place only by the flange bolts, it relies on centering holes or bolt guides to stay aligned in the line, and it is not rated to serve as a dead-end valve for removing downstream piping the way a lug body is. Within those limits, a wafer valve is the economical choice for the majority of in-line isolation points where both sides stay piped.
In-line isolation points where both sides remain piped, weight and space are limited, and cost matters most.
With the liner doubling as a gasket, material choice for liner and disc is central to wafer valve performance.
| Component | Options | Role | Notes |
| Body | PVC-U, CPVC, PP, PVDF | Ring that locates the valve between flanges | Centering holes or bolt guides on request |
| Disc | Matched to body material | Rotates to open or close the flow path | Smooth edge to seal against the liner |
| Liner | EPDM, FPM | Seals the disc and acts as the flange gasket | Wraps over the body faces |
| Stem | Stainless steel or reinforced plastic | Transfers operator torque to the disc | Isolated from the fluid by the liner |
| Item | Description |
| Valve Type | Wafer style plastic butterfly valve |
| Body & Disc | PVC-U, CPVC, PP, or PVDF |
| Liner Material | EPDM or FPM |
| Size Range | DN40 – DN400 (1-1/2 inch – 16 inch) |
| End Connection | Clamped between flanges, ANSI / DIN / JIS patterns |
| Working Pressure | Up to 150 psi (10 bar) at 20°C, rating decreases with temperature |
| Working Temperature | 0°C to 90°C, material dependent |
| Operation | Lever to DN200, gear operator or actuator above |
| Flow Direction | Bidirectional |
| End-of-Line Use | Not recommended without a blind flange or downstream pipe |
Both are quarter-turn plastic butterfly valves; the body style decides how they are held and what can be removed downstream.
| Factor | Wafer Style | Lug Style |
| Body Mounting | Held by flange bolts passing around the body | Threaded lugs accept bolts from each side |
| Dead-End Service | Not suited without downstream flange | Suited, with one side removable |
| Weight | Lighter | Heavier because of the lugs |
| Cost | Lower | Higher |
| Installation | Requires careful centering between flanges | Bolts thread into the lugs, easier alignment |
| Best Use | In-line isolation with both sides piped | End-of-line and removable downstream piping |
A thin ring body holds the liner, disc, and stem, and is clamped between the flange faces.
Body thickness, liner fit, and flange compatibility are verified for each wafer valve.
All wafer bodies share a standard top flange, so the operator can be chosen for size and duty.
| Operation Type | Best Suited For | Key Characteristics |
| Notched Lever | Smaller sizes up to about DN200 | Quick quarter-turn action |
| Gear Operator | Larger sizes and fine throttling | Low effort, self-locking |
| Pneumatic or Electric Actuator | Automated lines | Mounts on the standard top flange |
Payment: T/T (bank transfer), L/C, and PayPal are accepted, with flexible terms for repeat orders. A deposit is typically required to confirm production.
Shipping: Sea freight (FCL/LCL) for bulk orders, air freight for urgent shipments, and express courier for samples. Valves are cartoned and palletized, with discs slightly open for transit.
Delivery: Shipment from the nearest available port or airport, with door-to-door, FOB, CIF, or EXW terms on request.
Each valve is covered under a standard warranty against manufacturing defects in material and workmanship, generally valid for 12 months from the shipment date.
Overview Quarter-turn lever operation for compac
Overview A raised-seat body geometry that reduce
Overview A spring-assisted element that closes f
Overview Compressed-air operation for fast, repe
Overview Motor-driven shutoff for remote, wired
Overview A free-moving ball that seals the line
Overview A hinged disc that swings clear of the
Overview Automatic backflow prevention in corros
Overview A reinforced body engineered for the up
Share your size, flange pattern, and fluid, and get a body and liner recommendation.
Start your cooperation journey with Baodi
Contact
baodivalve@bdsjfm.com
+86-574-86817753
+86-574-86812190
After-Hours Hotline：
+86-18395898313
NO.42 Yongjiang Road, Beilun,Ningbo city, Zhejiang province,P.R.China
Custom Wafer Style Plastic Butterfly Valves Manufacturers
