SUN Circuit Savers

Fixed Orifice, Flow Fuse Valve

• Maximum operating pressure = 5000 psi
• Maximum valve leakage = FQCA: 2 in³/min. at 1000 psi, FQEA: 3 in³/min. at 1000 psi, FQGA: 4 in³/min. at 1000 psi, FQIA: 5 in³/min. at 1000 psi.
• Valve closes when flow from port 1 to port 2 exceeds the setting of the valve. Valve resets when pressures at port 1 and port 2 are equal.
• Flow setting should be at least 25% above maximum normal system flow.

Air Bleed and Start-up Valve

• Maximum operating pressure = 5000 psi
• Air-bleed and start-up valves require a minimum of 4 GPM flow rate and 80 psi system pressure.
• The valve will re-open when system pressure falls below 25 psi.
• After air has been purged, closing times vary from approximately 12 seconds at 4 GPM to 0.5 seconds at 50 GPM.

Check, Pilot-to-Close

Pilot Ratio 120:1

• Maximum operating pressure = 5000 psi
• Pilot ratio = 120:1
• Leakage rate when closed = 5 drops/min.

Check, Pilot-to-Close

Pilot Ratio 1.8:1

• Maximum operating pressure = 5000 psi
• Pilot ratio = 1.8:1
• Leakage rate when closed = 1 drop/min.

Accumulator Sense, Pump Unload Valve – Pilot Capacity

• Maximum operating pressure = 5000 psi
• When applying this cartridge, a separate drain line is required to prevent erratic operation caused by tank line pressure fluctuations.
• Note: Careful consideration should be given when selecting an adjustment range. System pressure drops and flows tend to affect the operation of unloading valves.

Accumulator Sense, Pump Unload Valve with Check – Pilot Capacity

• Maximum operating pressure = 5000 psi
• Check valve capacity = 12 GPM
• Free flow check cracking pressure = 4 psi
• Pressure drop, port 1 to port 2 = 70 psi at 12 GPM
• When applying this cartridge, a separate drain line is required to prevent erratic operation caused by tank line pressure fluctuations.
• Note: Careful consideration should be given when selecting an adjustment range. System pressure drops and flows tend to affect the operation of unloading valves.

Direct Acting, 2-way Directional Valve with Drain to Port 4 – Normally Closed

• Maximum operating pressure = 5000 psi
• The pilot area (port 1) and the spring chamber drain (port 4) are positively sealed.
• There is spool leakage between the work ports (ports 2 and 3), 0.03 in³/min. at 1000 psi.

Direct Acting, 2-way Directional Valve with Drain to Port 4 – Normally Open

• Maximum operating pressure = 5000 psi
• The pilot area (port 1) and the spring chamber drain (port 4) are positively sealed.
• There is spool leakage between the work ports (ports 2 and 3), 0.03 in³/min. at 1000 psi.

Vent-to-shift 2-position Diverter Valve – Normally Closed

• Maximum operating pressure = 5000 psi
• Nominal vent flow = DSCX. DSEX: 23 in³/min., DSGX, DSIX: 35 in³/min.
• There must be a pressure source at port 3, relative to port 1, to shift the valve.

Vent-to-shift, 2-position, 3-way Diverter Valve

• Maximum operating pressure = 5000 psi
• Nominal vent flow = DSCY. DSEY: 23 in³/min., DSGY, DSIY: 35 in³/min.
• There must be a pressure source at port 3, relative to port 1, to shift the valve.

Normally Open, Bi-directional, Modulating Logic Element

• Maximum operating pressure = 5000 psi