Atmospherically referenced, direct-acting sequence valve without reverse flow check

Capacity: 15 gpm60 L/min. | Cavity: T-13A
SXCB : Atmospherically referenced, direct-acting sequence valve without reverse flow check
Technical Features [ + ]

Atmospherically referenced, direct-acting sequence valves will supply a secondary circuit with flow once the pressure at the inlet (port 1) has exceeded the valve setting. The pressure setting of this sequence valve controls the pressure at port 1 relative to the atmospheric vent.

  • Suitable for use in load holding applications.
  • Atmospherically referenced valves should only be used where it is impossible have a drain connection. Over time, the atmospherically referenced valves may leak externally or allow moisture into the spring chamber.
  • Approximately 1 drop (0,07 cc) of fluid will pass into the vented spring chamber every 4000 cycles.
  • Cartridges configured with EPDM seals are for use in systems with phosphate ester fluids. Exposure to petroleum based fluids, greases and lubricants will damage the seals.
  • Incorporates the Sun floating style construction to minimize the possibility of internal parts binding due to excessive installation torque and/or cavity/cartridge machining variations.
Technical Data [ + ]
Note: Data may vary by configuration. See CONFIGURATION section.
Cavity T-13A
Series 1
Capacity 15 gpm60 L/min.
Factory Pressure Settings Established at 2 in³/min.30 cc/min.
Maximum Operating Pressure 5000 psi350 bar
Maximum Valve Leakage at Reseat 10 drops/min.0,7 cc/min.
Response Time - Typical 2 ms2 ms
Adjustment - No. of CW Turns from Min. to Max. setting 44
Valve Hex Size 7/8 in.22,2 mm
Valve Installation Torque 30 - 35 lbf ft41 - 47 Nm
Adjustment Screw Internal Hex Size 5/32 in.4 mm
Locknut Hex Size 9/16 in.15 mm
Locknut Torque 80 - 90 lbf in.9 - 10 Nm
Model Weight .30 lb0,15 kg
Seal kit - Cartridge Buna: 990010007
Seal kit - Cartridge EPDM: 990010014
Seal kit - Cartridge Polyurethane: 990010002
Seal kit - Cartridge Viton: 990010006
Performance Curves [ + ]
FAQs [ + ]

There are exactly 250 Sun drops in a cubic inch or 15 in a cc.

A sequence valve opens when the pressure at port 1 exceeds the setting of the valve. When pressures at port 1 and port 2 both exceed the setting of the valve the valve goes full open, or sequences. When this happens flow can go in either direction, just so long as port 1 stays above the setting.

Pressure setting tolerances are listed in our Performance Data page. A link to this page can also be found in the Additional Resources tab of the applicable product page.

Only external seals are serviceable.  Sun offers replacement seal kits for all cartridge models. The applicable kit part number can be found in the product page's Technical Data table or by using our Cartridge Seal Kit search function located under Accessories. Please note: Converting the external seals from one material to another does not ensure fluid compatibility with that material due to the existence of internal seals within the cartridge.
Additional Resources [ + ]