Series Foot Valve - 583 | Cla-Val

Cla-Val 583 Series “Tite Seal” Foot Valve

The Cla-Val 583 is a foot check valve designed for pump suction lines, featuring ANSI flanged connections and a ductile iron body per ASTM A536. Its primary function is to maintain pump priming and prevent backflow into the suction line during pump shutdown.

Sealing Mechanism

The 583 Series utilizes a “Tite Seal” arrangement with a Buna-N elastomer seat. Initial sealing occurs at the metal disc for zero leakage. As differential pressure increases, the Buna-N is compressed incrementally until full contact with the metal seat is achieved. This design limits elastomer over-compression and ensures reliable pump priming retention.

Typical Characteristics

• Type: Foot check valve (non-return valve for pump suction)
• Connection: ANSI flanged
• Standard: ANSI
• Pressure class: 125 lbs, 150 lbs
• Body: ASTM A536 ductile iron
• Seat: Buna-N elastomer
• Media: potable water, process water, pump station networks

Applications

Suitable for:

• Centrifugal pump suction lines
• Wells and reservoirs
• Water supply pump stations
• Irrigation pumping stations
• Installations requiring pump priming retention

Selection Criteria

Selection is based on ANSI flange class, suction diameter, available NPSH, allowable pressure drop, and Buna-N compatibility with the process fluid. For applications with suspended solids, verify strainer or screen integrity and implement a maintenance inspection schedule.

FAQ

Why is it installed on the suction side?
To prevent line drainage when the pump is stopped, maintaining system prime.

What is the function of the Buna-N seat?
It provides tight shutoff to retain pump priming and minimize leakage.

Is this a flow control valve?
No. It is a non-return valve designed solely to prevent reverse flow.