Roemheld CLR-449-V | 1500 to 6500 PSI Range Normal Sequence Valve

Roemheld Sequence Valve

7250 psi max
Use to automatically sequence positioning, clamping, and supporting functions as system pressure increases. Sequence Valves prevent fluid flow to a portion of the fixture until a predetermined trigger pressure is achieved (easily adjustable). Use in multiples for multi-stage sequencing. The version is used for manifold mounting without exposed fluid lines. The version is used for in-line mounting with standard fittings and exposed fluid lines.

Application Information

Operation

To set up initially, turn the adjustment screw on top until the desired trigger pressure is achieved. During normal operation, Sequence Valve opens automatically when system pressure reaches the set trigger pressure. After the valve opens, system pressure rises uniformly on both upstream and downstream sides (no pressure drop upstream when the valve opens).

Design Considerations

Choose normal-range model instead of low range whenever possible. Normal-range version provides a wider adjustment range, especially important when used with an Air Power Unit, which has a 2200-psi minimum operating pressure. For multi-stage sequencing, set trigger pressures in steps of at least 750 psi (normal range) or 375 psi (low range).

Mounting & Fluid Supply

Fluid enters and exits through two O-ring ports fed by drilled fixture passages. For manifold mounting, the mounting surface must be ground flat to ensure proper O-ring sealing (32 RMS max). Fasten with three #10 or M5 cap screws. Mount in any position, horizontal or vertical.

Parts Specification

Version	Trigger-pressure Adjustment Range (PSI)	Pressure Change Per Screw Turn (PSI)	Maximum Flow Rate (cu In/min)	A Diameter (mm)	B (mm)	Weight (lbs)
Normal Range	1500 to 6500 PSI	440 PSI	490 cu in/min	28mm	146mm	1.4 lbs.