These Tank Valves are designed to protect process tanks and piping systems from the dangers of vacuum or over-pressurisation. Designed as lightweight, hygienic breather valves, the 645 Series ensures system integrity during operation by allowing controlled air movement into or out of the tank as required, maintaining a safe internal environment at all times. A precision-calibrated spring, seat-seal assembly, and polymer bushing are enclosed within a robust stainless steel housing, providing dependable and durable performance even under demanding process conditions.
Technical Specifications
Key Features
Benefits
| Feature |
Specification |
| Sizes Available |
DN25 – DN100 (1½” – 4″) |
| Sealing Materials |
EPDM, FPM (FKM), VMQ (Silicone) |
| Vacuum Break Pressure |
0.007 Bar (0.09 psi) |
| Opening Pressure (positive pressure) |
0.07 Bar (1 psi) |
| Sterilisation Temperature |
Up to 135°C |
| Housing Material |
Stainless Steel |
| Bushing Material |
Special Polymer |
- Lightweight, Compact Design: Facilitates easy installation without compromising durability
- Hygienic Construction: Suitable for high-purity and sanitary applications
- Reliable Protection: Prevents vacuum formation and over-pressurisation inside tanks and piping
- High-Temperature Resistance: Sterilisation capable up to 135°C (284°F)
- Calibrated Operation: Ensures consistent pressure control with minimal maintenance
- Maintains optimal tank and system pressure automatically
- Protects vessel integrity and product quality
- Reduces maintenance costs through reliable, long-lasting design
- Compatible with CIP/SIP systems for efficient cleaning and sterilisation
- Suitable for a wide range of hygienic and industrial applications
