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Cartridge valves – integrated into individual components via machined cavities
In the Hydromot online shop you will find high-quality screw-in valves and cartridge valves from Winner Hydraulics, which represent a powerful alternative to SUN Hydraulics products. The modular valves are integrated directly into valve blocks and perform precise control functions such as directional, pressure, or flow control. Learn more...
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Our range includes, among others, 2-way pressure compensators, 2-way flow control valves as well as pilot-operated check valves, designed for flow rates up to 60 l/min and operating pressures up to 350 bar. Thanks to standardized cavity types such as T-11A, T-13A, or T-163A, the valves are highly compatible and flexibly applicable. Typical applications are found in hydraulic systems of agricultural and construction machinery or industrial control blocks.
Cartridge valves (screw-in valves) – Frequently Asked Questions
What are cartridge valves (screw-in valves) and how do they work?
Cartridge valves, also known as screw-in valves, are modular hydraulic valves without their own housing, which are screwed directly into precisely machined cavities of a valve block. They perform directional, pressure, or flow control tasks. The valve element is integrated into the block; actuation can be mechanical, electrical, magnetic, or hydraulic – depending on the function (blocking, regulating, or controlling hydraulic or pneumatic media flows).
What advantages do cartridge valves offer?
- Compact design: Saves space and weight – ideal for tight installation spaces.
- High dynamics: Fast switching times with low leakage.
- Robustness: Resistant to contamination (with proper filtration).
- Flexibility: Many functions in the same block using interchangeable cartridges.
- Service-friendly: Quick replacement of individual cartridges, minimal downtime.
What materials are cartridge valves typically made of and which pressure ranges do they cover?
Typical materials:
- Hardened steel, stainless steel, brass, aluminum (depending on pressure, medium, and application)
- Seals: NBR, Viton (FKM), PTFE, etc., for temperature and chemical resistance
Performance range: Pressure ranges approx. 5–500 bar; flow rates from a few up to >230 l/min (depending on design).
In which areas and applications are cartridge valves used?
Wide range of applications in hydraulics:
- Construction machinery, agricultural machinery
- Injection molding machines, tools, industrial control blocks
- Accumulator and pressure balance applications
- Stationary and mobile applications (e.g. trucks, tractors, industrial plants)
They control flow rate, pressure, or direction of fluids depending on the application.
How are cartridge valves installed and maintained?
Installation: The valve element is screwed from the outside into a precisely machined cavity of the valve block via a threaded connection with seal (e.g. O-ring). High dimensional accuracy ensures sealing and function.
Maintenance: Generally user-friendly; service life depends on medium, pressure, installation position, and maintenance intervals. Regular inspections extend service life. Wear parts such as seals or solenoids are usually easy to replace – minimizing downtime.
What criteria are important when selecting cartridge valves?
- Medium: Type of hydraulic fluid, temperature, viscosity, cleanliness requirements
- Pressure & flow: Max. system pressure, required flow rate, pressure stability
- Size/installation space: Space availability, size of valve block
- Special requirements: Explosion protection, resistance to aggressive media, coatings/surface treatments
- Compatibility: Fit to existing blocks and relevant standards (ISO/DIN)
Who supplies cartridge valves and are there alternatives?
Cartridge valves are offered by various manufacturers. Winner Hydraulics supplies cartridge valves that can serve as alternatives to SUN Hydraulics products – e.g. type LP-11A-30-70-N, similar to SUN LPDC-XFN.
What types of cartridge valves are available?
- 2-way pressure compensators: e.g. type LP-11A-30-70-N, similar to SUN LPDC-XFN.
- 2-way flow control valves: e.g. FR-13A-20-A-L and FR-13A-20-C-L, similar to SUN FDBA-LAN and FDBA-LCN; regulate flow rate.
- Pilot-operated check valves: e.g. CO-163A-3C-20-N, similar to SUN CKBD-XCN; block/release reverse flow as needed.