01Facility loop
Chilled water or condenser water supply.
Data center liquid cooling solutions
Data center liquid cooling. Valves built for uptime.
Engineered for continuous data center operation, Diefei liquid cooling valves combine low flow resistance, tight sealing and broad media compatibility across CDU primary and secondary loops, chilled water systems, cold-plate cooling and immersion cooling.
7×24 continuous-duty design Low-pressure-drop flow paths Remote valve-position monitoring
Typical liquid cooling loopValve critical points
02CDU
Primary and secondary heat-exchange circuits.
03Distribution
Isolation, balancing, filtration and control.
04Heat load
Cold plates, manifolds or immersion tanks.
05Return & service
Pump protection, monitoring and maintenance.
7×24Continuous data center operation
25%+Pressure-drop reduction target
72 hFactory pressure testing
pH 0–14FEP/PTFE full-lining option
Application scope
One valve strategy.
Four critical fluid interfaces.
Liquid cooling introduces tight pressure budgets, mixed materials, continuous operation and limited maintenance windows. Diefei builds the valve package around those system realities, from the facility side of the CDU to the final heat load.
CDU primary and secondary loops
Isolation, check, flow-control and filtration products for heat-exchange skids, pumps, manifolds and service branches.
Cooling water and chilled water
Valve packages for facility-side cooling circuits where stable flow, dependable shutoff and maintainable connections are essential.
Cold-plate and immersion cooling
Media-compatible valves, seals and linings for coolant distribution units, manifolds, immersion tanks and service isolation.
Air-conditioning fluid systems
Butterfly, check, ball and flexible connection options for water and fluorinated refrigerant lines around the data hall.
Uptime first
Products are selected for 7×24 operation, fatigue resistance and dependable sealing through repeated thermal and pressure cycles.
Protect the pressure budget
Precision low-resistance flow paths help reduce pump energy and preserve available pressure at dense compute racks.
Match the medium
Body, seat, seal and lining options are reviewed together for water, glycol, fluorinated coolant and aggressive service media.
System architecture
Valves where the loop
cannot afford a weak point.
A complete liquid cooling valve package follows the heat path rather than a single product category. Every interface has a different duty: isolation, reverse-flow protection, filtration, flexible connection or monitored control.
From facility water to the heat load
A representative CDU-based liquid cooling loop.
Primary loop Secondary loop Monitoring
Selection note Valve type, pressure class, body material, seal material and actuator are confirmed against the actual loop, fluid, temperature, pressure and maintenance strategy.
Product portfolio
A complete valve set,
selected around the loop.
The Diefei liquid cooling portfolio covers the main isolation, reverse-flow, filtration, flexible-connection and control functions required around CDU skids and coolant distribution systems.
Isolation / control
Soft-seated butterfly valves
Compact quarter-turn isolation for CDU piping, manifolds and facility water circuits.
View butterfly valves ↗
Compact installation
Wafer butterfly valves
Space-efficient wafer designs for densely packed skids and distribution headers.
Explore the range ↗
Flanged connection
Flanged centerline butterfly valves
Stable flanged connection for larger lines, service isolation and controlled flow.
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Reverse-flow protection
Single- and double-plate check valves
Pump protection and low-resistance non-return control for supply and return lines.
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Automated isolation
Stainless steel electric ball valves
Stainless construction with electric actuation for automated isolation and control.
Discuss actuation ↗
Pump and loop protection
Filters
Filtration points for protecting pumps, heat exchangers and narrow coolant passages.
View the strainer ↗
Vibration isolation
Rubber expansion joints
Flexible connections that accommodate movement and reduce vibration transmission.
Review connection options ↗
Monitoring-ready
Intelligent control valves
Control options with remote valve-position monitoring and real-time feedback for DCIM.
Explore smart control ↗Electric, pneumatic and intelligent actuator options.
Actuation is matched to the valve, control signal, duty cycle and monitoring requirement. Remote valve-position feedback can be integrated into the data center management environment.
Pressure and temperature
Documented ranges.
Project-specific confirmation.
The values below summarize the supplied Diefei liquid cooling reference material. Final pressure, temperature, material and actuator ratings depend on size, structure and configuration.
| Product family | Pressure range | Temperature range | Selection context |
|---|---|---|---|
| Soft-seated butterfly valves | 1.0 / 1.6 MPaHigh-performance RPTFE seat: 2.5 / 5.0 MPa | -29°C to +120°CStainless steel low-temperature type: -40°C to +180°C | CDU piping, manifolds, chilled water and service isolation. |
| Single- and double-plate check valves | 1.0 / 1.6 / 2.0 / 2.5 MPaStainless steel body: up to 4.0 MPa | -29°C to +120°CStainless steel body: -40°C to +180°C | Pump discharge, reverse-flow protection and low-resistance return lines. |
| Stainless steel electric ball valves | 1.6 / 2.5 MPa | -40°C to +210°C | Automated isolation and control in stainless piping. |
| Rubber expansion joints | 1.0 / 1.6 MPa | -29°C to +90°C | Flexible connections, movement compensation and vibration isolation. |
MPa ratings and temperature ranges are reproduced from the supplied solution material. Confirm the final model, connection, body material, seat, seal and actuator against the official selection manual and technical confirmation.
Media and sealing
The fluid decides
the material package.
Water, glycol and fluorinated coolants interact differently with elastomers and metal surfaces. Diefei combines media review, seal selection and optional full-lining to build a compatible wetted path.
GLYCOL
Ethylene glycol
A common heat-transfer fluid in closed cooling loops. EPDM sealing is a typical starting point for water-based glycol service.
H₂O
Cooling and chilled water
Primary and secondary circuit media requiring dependable sealing, controlled pressure loss and maintainable isolation points.
F-LOOP
Fluorinated coolant
Used in cold-plate and immersion liquid cooling. PTFE sealing and FEP/PTFE full-lining options support chemically demanding service.
Quality and assurance
Reliability is a process,
not a final inspection.
Data center valves need a repeatable quality record from incoming material to final pressure testing. Diefei combines process checkpoints, standards-based testing and monitoring-ready control options.
Control from raw material to shipment.
Each production stage is tied to a defined verification point. The result is a documented path from material and machining through assembly, pressure testing and dispatch.
3×Raw-material sampling checks
12Process verification points
72 hFactory pressure test
0Leakage acceptance target
Documented certification and system standards
ISO 9001Quality management system
ISO 14001Environmental management system
OHSAS 45001Occupational health and safety system
TS2713660-2028Special equipment manufacturing license
CE / PEDPED 2014/68/EU
NSF/ANSI 61/372Drinking-water system components
Certification scope can vary by product and configuration. Confirm the current certificate and applicable standard for the selected model before project approval.
ISO 15848 low-leakage Class A and industrial zero-leakage Class A targets, supported by type testing at national pump and valve product testing organizations.
Products are aligned with the supplied reference requirements for TSG D7002-2006, GB 50174 data center design and ODCC liquid cooling practice.
IoT remote valve-position monitoring and real-time data feedback support integration with data center infrastructure management systems.
Application references
Experience in demanding
data center cooling systems.
Diefei's liquid cooling references include large data center CDU applications and joint development work for ultra-low-resistance check valves in magnetic-bearing chiller systems.
Reference application
Alibaba large data center liquid cooling CDU system
Valve supply for a large liquid cooling CDU application, supporting the isolation, flow and service functions required in a continuous data center environment.
Liquid cooling CDU reference
Joint development
McQuay magnetic-bearing chiller check valve
Jointly developed ultra-low-resistance check valve for magnetic-bearing chiller units, with pressure drop below 0.04 MPa on both sides.
< 0.04 MPa dual-side pressure drop
Liquid cooling FAQ
Questions before you select the valve.
Use these answers as an early selection guide. Final valve, seal, pressure class and actuator choices should be confirmed against the actual loop and project specification.
Which valves are used in data center liquid cooling systems?
Diefei supplies soft-seated butterfly valves, wafer and flanged butterfly valves, single- and double-plate check valves, stainless steel electric ball valves, filters, rubber expansion joints, and intelligent control valves. Electric, pneumatic, and smart actuators with remote valve-position monitoring are available for CDU primary and secondary loops, cooling water, and cold-plate or immersion cooling systems.
Which cooling media can Diefei liquid cooling valves handle?
The portfolio is configured for ethylene glycol, cooling water, chilled water, and fluorinated coolants used in cold-plate and immersion liquid cooling. For aggressive media, FEP/PTFE full-lining options and suitable seal materials can be reviewed against the actual fluid, concentration, temperature, and pressure.
What pressure and temperature ranges are available?
Documented ranges vary by product. Soft-seated butterfly and single- or double-plate check valves are listed for 1.0 to 2.5 MPa, with RPTFE-seat butterfly valves up to 5.0 MPa and stainless steel check valves up to 4.0 MPa. Stainless steel electric ball valves are listed for 1.6 to 2.5 MPa. Temperature ranges extend from -40°C to +210°C depending on construction, while rubber expansion joints are listed for -29°C to +90°C. Final values must be confirmed for size, structure, and actuator configuration.
How does Diefei support low-pressure-drop liquid cooling design?
Diefei uses a precision low-resistance flow path designed to reduce pressure drop by more than 25% compared with ordinary data-center valves. For the McQuay magnetic-bearing chiller program, Diefei developed an ultra-low-resistance check valve with pressure drop below 0.04 MPa on both sides. Final pressure-drop performance should be confirmed by the selected model and project conditions.
How are quality and remote valve monitoring handled?
Quality controls include three raw-material sampling checks, 12 process verification points, a 72-hour factory pressure test, and zero-leakage testing. Diefei also supports IoT remote valve-position monitoring and real-time feedback for DCIM integration. Certification scope and monitoring features should be confirmed against the selected valve and project documentation.
Start a liquid cooling valve review
Bring us the loop, the medium and the pressure budget.
Our team can help match valve type, body material, seal, lining and actuator configuration to your CDU or coolant distribution design.
