DN100 NBR Wafer Butterfly Valve
Concentric · DN100 · PN16 · NBR Seat · Lever Handle
Reguvale's DN100 NBR wafer butterfly valve is a concentric rubber-seated valve designed to be sandwiched between two PN16 pipe flanges. It is a compact and economical shutoff solution for 4-inch pipelines handling water, air, oil, and petroleum-based fluids.
The valve shown features a ductile iron body with epoxy coating, SS304 disc, and NBR seat rated for oil and fuel service up to +82°C. A nylon-coated lever handle with locking device allows quick 90° operation. The through-hole wafer design fits between ANSI, DIN, JIS, and BS flanges without special hardware.
Each valve is hydrostatically tested at our Tianjin factory before shipment. Other sizes (DN50–DN300) and seat materials (EPDM, Viton) are available on request.
Product Video
DN100 NBR wafer butterfly valve – factory overview and product details.
Key Features
Compact & Lightweight
A wafer butterfly valve weighs a fraction of a gate or globe valve of the same size and takes up very little face-to-face space, reducing installation cost.
Quarter-Turn Operation
90° rotation from fully closed to fully open in under 2 seconds with a lever handle, or smooth operation with a gearbox.
Oil & Fuel Resistant
The NBR seat provides excellent resistance to petroleum-based oils, fuels, and oily wastewater compared with standard EPDM.
Bubble-Tight Shutoff
Concentric rubber-lined design achieves Class VI bubble-tight shutoff when properly selected and installed.
Flexible Actuation
Available with manual lever handle, worm gearbox, electric actuator, or pneumatic actuator for automated control.
Low Cost of Ownership
Simple construction with few moving parts, replaceable seat, and no regular lubrication needed makes lifecycle cost very low.
Technical Specifications
| Parameter | Specification |
|---|---|
| Body Material | Ductile Iron GGG50 (Epoxy Coated) / SS304 / SS316 on request |
| Disc Material | SS304 / SS316 / Ductile Iron Nickel-Al-Bronze Plated |
| Seat Material | NBR (EPDM / Viton available) |
| Design Type | Concentric (Rubber-Lined) |
| Size | DN100 (4") |
| Pressure Rating | PN16 |
| End Connection | Wafer (Sandwiched Between Flanges) |
| Operation | Lever Handle / Worm Gearbox / Electric / Pneumatic |
| Temperature | NBR: −20→+82°C | EPDM: −20→+120°C | Viton: −15→+200°C |
| Leakage Class | Class VI (Bubble-Tight) for rubber-lined |
| Standards | ISO 5752 / MSS SP-67 / BS 5155 |
| Certification | ISO 9001:2015, SGS Material Test Certificate available |
Frequently Asked Questions
What is a DN100 wafer butterfly valve used for?
A DN100 wafer butterfly valve is used for on/off isolation and light throttling in 4-inch pipelines handling water, air, oil, and compatible fluids. The NBR seat version is especially suitable for petroleum-based oils, fuels, and oily wastewater.
Can this DN100 NBR wafer butterfly valve be used for dead-end service?
No. Because the wafer design relies on both pipe flanges to clamp the valve body in place, it is not suitable for dead-end or tank-bottom service where one flange may be removed. For those applications, choose a lug or flanged butterfly valve.
Is NBR better than EPDM for a butterfly valve?
NBR is preferred for oils, fuels, and petroleum products. EPDM is better for water, air, and weak chemicals. For hot water or steam, EPDM or Viton/FKM should be considered instead.
Applications & Use Cases
Water Treatment
Distribution, filter backwash, and oily wastewater lines.
Petroleum & Fuel
Oil storage, transfer, and fuel lines where NBR seat compatibility is required.
Industrial Pipelines
Compressed air, lubrication, and process water isolation.
General HVAC
Cooling and chilled water isolation where NBR is acceptable.
Related Products
Wafer Butterfly Valves
DN50–DN300 · PN10/16
Butterfly Valves
Wafer · Lug · Flanged
Pneumatic Butterfly Valves
Double Flanged · ActuatedRelated Articles
Helpful guides to help you specify and maintain butterfly valves.