Sanitary Butterfly Valves
Sanitary butterfly valves are commonly adopted in applications with strict hygiene requirements. They satisfy special demands for various media in food and biopharmaceutical industries. The smooth, crevice-free flow channel with self-draining design suits steam service and other Clean-in-Place (CIP) requirements.
All steel components of sanitary butterfly valves are manufactured from food-grade stainless steel with food-grade rubber sealing materials to meet high hygienic requirements. According to different end connections, types include male thread, clamp, butt-weld and three-piece welded connection.
Both internal and external surfaces are processed with high-grade polishing equipment. The smooth surface guarantees cleanliness without dead zones for medium accumulation, avoiding potential contamination. Widely applied in process control for food, pharmaceutical, cosmetic, clean steam, wine, beverage and biochemical industries.
Main Features
Manual Operation
Feature: Handle operation, simple and user-friendly; 90° rotation to open or close the valve.
Advantage: Suitable for simple applications without automation; cost-effective and easy maintenance.
Sanitary Design
Feature: Constructed from stainless steel (normally 316L) with smooth internal and external surfaces for easy cleaning, compliant with hygienic standards.
Advantage: Lower contamination risk and ensure purity of products and liquids, ideal for high-level sterilization environments.
Compact Structure
Feature: Compact, lightweight butterfly valve design with small installation footprint.
Advantage: Easy installation in space-limited piping systems while delivering reliable flow control.
Superior Sealing Performance
Feature: Equipped with rubber or PTFE seals to achieve excellent tightness and prevent fluid leakage.
Advantage: Bubble-tight shutoff, suitable for operations demanding high sealing performance.
Quick Connection
Feature: Adopt quick screw or clamp connection for easy assembly and disassembly.
Advantage: Improve maintenance efficiency, especially for environments requiring frequent cleaning and service.
Technical Data
| Item | Parameter |
|---|---|
| Alias | Food-grade hygienic butterfly valve |
| Max working pressure | DN15-DN100: 1000kPa (10Bar); DN125-DN150: 800kPa (8Bar) |
| Minimum pressure resistance | Full vacuum (EPDM) |
| Temperature range | -10°C ~ +120°C |
Actuator Parameters
| Item | Parameter |
|---|---|
| Max air supply pressure | 700 kPa (7 bar) |
| Minimum air supply pressure (NC & NO) | 400 kPa (4 bar) |
| Temperature range | -25°C ~ +90°C |
Working Principle
Sanitary butterfly valve features a circular valve body with a rotary disc supported by the stem. It can be remotely controlled by an actuator or manually operated by a handle. The manual handle mechanically locks the valve at fully open, partially open and fully closed positions. Rotating the handle drives the disc to turn parallel or perpendicular to flow direction to cut off or enable fluid flow.
The actuator converts axial piston movement into 90° rotation of the valve stem. The actuator torque rises when the disc contacts the valve seat seal.
Operation Configuration
1. Three standard actuator versions: Normally Closed (NC), Normally Open (NO), Double-Acting (A/A).
2. Electric actuator optional power supply: AC 24V, 110V, 220V, 380V; DC 24V, 50Hz/60Hz.
Available stroke time: 9s, 10s, 13s, 15s, 20s, 25s, 30s, 50s, 60s, 100s.
3. Manual handle enables 3-position locking: Fully open, partially open, fully closed.
*Refer to "Available Handles" for different handle styles.
Material Specifications
| Category | Details |
|---|---|
| Steel Components | Product-wetted steel parts: Forged AISI 316L / 304 (1.4306 / 1.4404), Material Test Report available upon request. Other steel components: AISI 304 |
| Sealing Materials | Standard: EPDM All sealing materials comply with FDA 21CFR117.2600 Optional: VMQ / FPM |
| Pressure | Working pressure: ≤10 bar (145 PSI) Air supply pressure for pneumatic actuator: 5～8 bar (70～116 PSI) |
| Temperature | EPDM: 14 ~ 248°F (-10 ~ 120°C) VMQ: -58 ~ 356°F (-50 ~ +180°C) FPM: -22 ~ 446°F (-30 ~ +230°C) Solutions for other temperature ranges available on request. Sterilization temperature: 302°F (150°C, max. 20 minutes) |
| Surface Finish | Internal surface roughness: Ra 16 ~ 32µin (0.4 ~ 0.8µm) External surface roughness: Ra 32 ~ 64µin (0.8 ~ 1.6µm) |
| Connection Standards | Weld end standards: DIN 11850-2 & DIN 11850-1 / SMS / 3A / ISO series End connections: Butt-weld, sanitary clamp, male & female thread, flange, I-line; other connections available on request. |
Applications
Food & Beverage Industry
Used in production and processing of milk, beer, fruit juice and other beverages for flow control and regulation.
Pharmaceutical Industry
Suitable for manufacturing medicines and biological products to guarantee sterile and clean fluid transportation.
Cosmetic Manufacturing
Applied in mixing and filling processes of cosmetic liquids for precise fluid regulation.
Water Treatment
Used for ultrapure water and industrial water treatment to realize proper flow adjustment and control.
