Quarter-turn plastic butterfly valves with a notched hand lever, fast to operate, light in weight, and sized for the small and medium diameters where manual lever control is practical.
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 Lever Operated Plastic Butterfly Valves Manufacturers and Custom Lever Operated 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
Lever operated plastic butterfly valves turn a disc through 90 degrees with a hand lever locked into a notched plate, giving the operator fixed positions for fully open, fully closed, and several throttling settings. The disc and body are molded from PVC-U, CPVC, PP, or PVDF, and a resilient liner seals against the disc edge, so the valve closes tightly without the cavity and packing of a ball or gate valve.
A single operator can drive a lever comfortably up to roughly DN200, which is why lever handles are the standard choice for smaller butterfly valves. Above that size the torque rises quickly and a gear operator takes over. Within the lever range, the valve is light, short in face-to-face length, and quick to open or close, which suits water distribution, process headers, and equipment isolation where speed and compactness matter.
Medium-diameter lines that are opened and closed by hand, and that value speed and low weight, are the natural home of lever operation.
The body and disc set the chemical range; the liner sets the sealing behavior and temperature limit.
| Component | Options | Selection Basis | Notes |
| Body & Disc | PVC-U, CPVC, PP, PVDF | Fluid chemistry and temperature | Matched pair for uniform chemical resistance |
| Liner / Seat | EPDM, FPM | Fluid and temperature | EPDM for water, FPM for oils and solvents |
| Stem | Stainless steel or reinforced plastic | Torque and corrosion environment | Isolated from the fluid by the liner |
| Lever | Powder-coated steel or glass-filled nylon | Outdoor or corrosive atmosphere | Notched plate with position locking |
| Item | Description |
| Valve Type | Lever operated plastic butterfly valve, wafer or lug body |
| Body & Disc | PVC-U, CPVC, PP, or PVDF |
| Liner Material | EPDM or FPM |
| Size Range | DN40 – DN200 (1-1/2 inch – 8 inch) |
| End Connection | 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 | Notched hand lever, typically 10-position |
| Sealing Performance | Bubble-tight shutoff with resilient liner |
| Flow Direction | Bidirectional |
The valve body is the same; the operator changes with size, torque, and how precisely the disc must be set.
| Factor | Lever Operated | Gear Operated |
| Speed of Operation | Quarter turn in a second or two | Multiple handwheel turns |
| Typical Size Range | Up to about DN200 | DN200 and larger |
| Throttling Precision | Fixed notch positions | Fine, continuous adjustment |
| Cost and Weight | Lower, lighter | Higher, heavier |
| Operator Effort | Increases rapidly with size | Low, even on large diameters |
| Best Use | Quick on/off on small and medium lines | Large lines and precise throttling |
A plastic disc rotates on a stem inside a resilient liner, with the lever mounted on the stem top.
Disc-to-liner fit and operating torque are checked closely because they set both sealing and effort.
A standard top flange allows the lever to be replaced with a gear operator or actuator without changing the valve.
| Operation Type | Best Suited For | Key Characteristics |
| Notched Lever | Manual on/off and set-position throttling | Lowest cost, quick action |
| Gear Operator | Larger sizes or fine throttling | Handwheel drive, low effort |
| Pneumatic or Electric Actuator | Automated lines | Mounts on the same 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 positioned 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 A slim wafer body that clamps between s
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 standard, 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 Lever Operated Plastic Butterfly Valves Manufacturers
