The Cla-Val Model 584 Series Flex-Check Valve is designed for long service life and maintenance-free check valve operation compared to traditional swing check valves. During system flowing conditions the disc flexes up to the open position allowing unrestricted flow through the valve. When system reverse flow conditions occur the disc flexes down to the closed position for drop-tight seal preventing reverse flow. It has a full-flow area body with an integral seat at a 45° angle to reduce head loss. This minimizes disc travel to 35° degrees for improved no-slam check action and for reliable vertical up-flow operation even on slurry applications. The body and cover are fusion bonded NSF/ANSI 61 fusion bonded epoxy coated for long service life on potable and non-potable systems.
Flex-Check Valve - 584 | Cla-Val
Cla-Val 584 Flex-Check Valve
The Cla-Val 584 is a flex-check type non-return valve designed for potable and process water networks. The flexible disc opens with forward flow and returns to the seat upon reverse flow, providing drop-tight shutoff. Suitable for applications requiring reliable backflow prevention and minimal leakage.
Operating Principle
The valve body is full-flow with an integrated seat set at a 45° angle. The disc travel is limited to 35°, which reduces closure time and mitigates hydraulic shock (slam) during pump shutdown. This design minimizes reverse flow and dynamic stresses on piping and pump assemblies.
Technical Specifications
- Type: Flex-check valve
- Body: Full-flow, integrated seat
- Seat angle: 45°
- Disc travel: 35°
- Coating: Fusion bonded epoxy
- Coating certification: NSF/ANSI 61
- Media: Potable water, process water, slurry applications
- Suitable for vertical upward flow installation
Applications
Commonly installed in water pumping stations, distribution networks, water treatment plants, pump discharge lines, and systems with increased risk of hydraulic transients. Compatible with both clean and slurry-laden water.
Comparison with Swing Check Valves
Compared to conventional swing check valves, the 584 features reduced disc travel and faster closure response. This limits reverse flow prior to seating and decreases dynamic loads on pumps, flanges, and pipework, especially during rapid flow reversals.
Selection Criteria
Selection should consider flow rate, velocity, pressure loss, installation orientation, compatibility with potable water, and potential presence of suspended solids. Evaluate based on process requirements and maintenance accessibility.
FAQ
Can it be installed vertically?
Yes, the design supports operation in vertical upward flow configurations.
What is the function of the 45° seat?
It reduces head loss and shortens disc closure travel.
Is it suitable for potable water?
Yes, the epoxy coating is certified to NSF/ANSI 61 for drinking water applications.
Datasheet and documents
Description
