Normally open, bi-directional, modulating element

Capacity: 15 gpm60 L/min. | Cavity: T-31A
LHDT : Normally open, bi-directional, modulating element
Technical Features [ + ]

These bi-directional, normally open, modulating elements used with an external orifice, create a bi-directional, pressure compensated flow control.

  • 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.
  • All ports will accept 5000 psi (350 bar).
  • 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-31A
Series 1
Capacity 15 gpm60 L/min.
Maximum Operating Pressure 5000 psi350 bar
Valve Hex Size 7/8 in.22,2 mm
Valve Installation Torque 30 - 35 lbf ft41 - 47 Nm
Model Weight .40 lb0,20 kg
Seal kit - Cartridge Buna: 990031007
Seal kit - Cartridge EPDM: 990031014
Seal kit - Cartridge Polyurethane: 990031002
Seal kit - Cartridge Viton: 990031006
Performance Curves [ + ]
FAQs [ + ]

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

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 [ + ]