4-way, manually operated, directional spool valve
Capacity: 10 gpm40 L/min. |
Cavity: T-31A
![DNDM : 4-way, manually operated, directional spool valve](https://cmsimages.sunhydraulics.com/cartg_dndm.gif)
Technical Features [ + ]
This manually operated, 2-position, 4-way directional cartridge is a direct-acting, balanced spool valve used to control the direction of flow in a hydraulic circuit. Manual operation is achieved via Sun's Twist/Lock manual override mechanism and is designed for intermittent (infrequent) use only.
- This valve is designed for intermittent use such as a manual override. The manual control assembly has a mechanical life expectancy of approximately 7,000 cycles.
- The momentary/twist control option "T" allows the operator to momentarily shift the valve by twisting the knob clockwise and releasing. Once released, the valve returns to its normal position.
- The detent/lock control option "L" allows the operator to shift the valve into a mechanically detented position by twisting the knob counter-clockwise. This detented position will be maintained until the operator twists the knob clockwise and allows the valve to return to its normal position. Please note that the detented position is for temporary shifting only and not intended to be a permanent detent.
- The dual-operation control option "D" allows the operator to either shift the valve momentarily by twisting the knob clockwise or shift it into a mechanically detented postion by twisting counter-clockwise. Please note that the detented position is for temporary shifting only and not intended to be a permanent detent.
- The control on this valve is meant to be operated by a person's hand. The control should not be modified, for instance fastening a lever to the knob. Under no circumstances should the control be operated by other mechanical devices.
- 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-31A |
Series | 1 |
Capacity | 10 gpm40 L/min. |
Maximum Operating Pressure | 5000 psi350 bar |
Maximum Valve Leakage at 110 SUS (24 cSt) | 10 in³/min.@3000 psi160 cc/min.@210 bar |
Operating Torque | 10 lbf in.1,2 Nm |
Valve Hex Size | 7/8 in.22,2 mm |
Valve Installation Torque | 30 - 35 lbf ft41 - 47 Nm |
Seal kit - Cartridge | Buna: 990431007 |
Seal kit - Cartridge | EPDM: 990431014 |
Seal kit - Cartridge | Viton: 990431006 |
Performance Curves [ + ]
FAQs [ + ]
There are exactly 250 Sun drops in a cubic inch or 15 in a cc.
Direct-acting valves are used to prevent over pressure, and pilot-operated valves are used to regulate pressure. If you are unsure, use a direct-acting valve. Sun's direct acting valves are very fast, dirt tolerant, stable, and robust. Sun's pilot-operated valves are moderately fast, they have a low pressure rise vs. flow curve, and they are easy to adjust.
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 [ + ]
Highlights
- Sun's New FLeX Series Solenoid Valves & Coils
- Sun Offers Zinc-Nickel Plating for Corrosion Resistance
- New FLeX Series Solenoid-Operated Directional Valves
- Pilot-to-Shift Directional Valves and Proportional Throttles
- Sun Expands Corrosion-Resistant Solutions
- Sun Cartridges with EPDM Seals
- Manually Operated Directional Valves
- QuickDesign with SmartConnect Offers Drag-and-Drop Schematic Tool
- Pilot Controlled Directional Cartridges Technical Tips
Technical Tips
- Manufacturing Sun Cartridge Cavities (522.27 KB)
Technical Information