Product Overview

The Sun Hydraulics CXHA-XAN is a high-flow Free Flow Check Valve designed to permit hydraulic flow in one direction while blocking reverse flow.

The CXHA belongs to the Sun Hydraulics CX*A check-valve family and is specified for approximately 80 GPM / 300 L/min, using a T-16A cartridge cavity. The valve is non-adjustable and rated for 5000 psi / 350 bar maximum operating pressure.(sunhydraulics.com)

Its basic function is:

Port 1 → Port 2: Free Flow

Port 2 → Port 1: Reverse Flow Blocked

The CXHA-XAN configuration uses a 4 psi cracking pressure and Buna-N seals.

Sun Hydraulics also specifies hardened and lapped sealing surfaces for its check-valve construction, supporting consistent shutoff performance and low leakage.(sunhydraulics.com)

For OEM replacement and retrofit applications, the valve can be engineered for in-place interchangeability according to the original cavity, flow direction, cracking pressure and seal configuration, followed by 100% simulated working-condition testing.

Technical Specifications

CXHA-XAN

• Manufacturer: Sun Hydraulics
• Series: CXHA
• Product Type: Free Flow Check Valve
• Flow Configuration: Nose-to-Side
• Model Code: CXHA-XAN
• Cavity: T-16A
• Nominal Capacity: 80 GPM / approximately 300 L/min
• Control: X = Non-adjustable
• Cracking Pressure: 4 psi / approximately 0.28 bar
• Seal Material: Buna-N
• Maximum Operating Pressure: 5000 psi / 350 bar
• Maximum Valve Leakage: 1 drop/min.
• Flow Direction: Free Port 1 → Port 2
• Reverse Flow: Blocked Port 2 → Port 1
• Cartridge Type: Screw-in cartridge
• Installation Torque: 150–160 lb·ft / approximately 203–217 N·m
• Adjustment: None

(sunhydraulics.com)

Related Model Verification

CXCD-XAN

CXCD-XAN should not be classified as a standard free-flow check cartridge.

Sun Hydraulics’ historical official sandwich catalog identifies it as a cartridge with:

• A → T relief
• T → B free-flow check
• B → T relief
• T → A free-flow check
• T-10A cavity

It is used in an ISO 03 sandwich-body configuration.(sunhydraulics.com)

CBDC

CBDC is a Sun Hydraulics semi-restrictive counterbalance valve.

Verified characteristics include:

• Pilot Ratio: 3:1
• Cavity: T-2A
• Nominal Capacity: 20 GPM / approximately 80 L/min
• Product Function: Counterbalance / load control

(sunhydraulics.com)

It should be selected for load-control and motion-control functions rather than used as a substitute for a conventional check valve.

CWCA-LIN

CWCA belongs to Sun Hydraulics’ four-port vented counterbalance valve family.

The official quick-reference documentation identifies CWCA as:

• 3:1 pilot ratio
• T-21A through T-24A cavity family
• Standard counterbalance configuration

(sunhydraulics.com)

The exact CWCA-LIN configuration could not be independently assigned a reliable flow and pressure setting from the currently accessible manufacturer documentation, so no unsupported values are given.

MBGM-XIN

Sun Hydraulics identifies MBGM-XIN as a balanced load-control cartridge:

• Product Type: Balanced Load Control Valve
• Configuration: Non-vented, non-relieving
• Nominal Capacity: 240 L/min
• Cavity: T-17A
• Control: Non-adjustable
• Minimum Control Pressure: 20 bar
• Seal: Buna-N
• Maximum Operating Pressure: 350 bar
• Reverse Check Cracking Pressure: 2 bar
• Installation Torque: 200–215 Nm

The manufacturer explicitly notes that this valve has no relief function, including thermal-expansion relief.(sunhydraulics.com)

MBEM-XIN

Sun Hydraulics identifies MBEM-XIN as the smaller balanced load-control configuration:

• Product Type: Balanced Load Control Valve
• Configuration: Non-vented, non-relieving
• Nominal Capacity: 120 L/min
• Cavity: T-2A
• Control: Non-adjustable
• Minimum Control Pressure: 20 bar
• Seal: Buna-N
• Maximum Operating Pressure: 350 bar
• Reverse Check Cracking Pressure: 2 bar
• Installation Torque: 60–70 Nm

(sunhydraulics.com)

Displacement, Speed and Peak Pressure

These are hydraulic cartridge valves, not pumps or hydraulic motors.

• Displacement: Not applicable
• Maximum Speed: Not applicable
• CXHA-XAN Maximum Operating Pressure: 350 bar / 5000 psi
• Peak Pressure: No separate verified model-specific peak-pressure rating is assigned here.

(sunhydraulics.com)

Key Technical Advantages

1. 80 GPM High-Flow Capacity

The CXHA provides approximately:

80 GPM / 300 L/min

making it suitable for high-flow hydraulic power units, mobile machinery and manifold systems.(sunhydraulics.com)

2. Non-Adjustable Configuration

The X control designates a non-adjustable valve.

The cracking pressure is defined by the internal spring configuration rather than a field-adjustment mechanism.(sunhydraulics.com)

3. 4 psi Low Cracking Pressure

CXHA-XAN uses:

4 psi / approximately 0.28 bar

cracking pressure.

This provides a low threshold for opening in the free-flow direction when minimizing unnecessary pressure differential is important.(sunhydraulics.com)

4. Hardened and Lapped Sealing Surfaces

Sun Hydraulics identifies hardened and lapped sealing surfaces as an important check-valve construction feature for reliable sealing and low leakage.(sunhydraulics.com)

5. T-16A Cartridge Integration

The CXHA uses the:

T-16A cavity

This supports compact manifold integration and standardized OEM cartridge-valve design.(sunhydraulics.com)

6. 350 Bar Maximum Operating Pressure

The CXHA series is rated for:

5000 psi / 350 bar maximum operating pressure

and the manufacturer states that 5000 psi is accepted at both Ports 1 and 2.(sunhydraulics.com)

Application Areas

Typical CXHA-XAN applications include:

• Hydraulic Power Units
• High-Flow Hydraulic Manifolds
• Construction Machinery
• Mobile Hydraulic Equipment
• Material Handling Equipment
• Hydraulic Presses
• Injection Molding Machines
• Steel Processing Machinery
• Hydraulic Cylinder Supply Circuits
• Pump Outlet Protection
• Industrial Hydraulic Stations
• High-Flow Fluid Isolation Circuits

Expert Maintenance Tips

1. Verify the T-16A Cavity

The CXHA-XAN cartridge must be installed in the correct:

T-16A cavity

Cavity verification is essential when replacing cartridge valves.(sunhydraulics.com)

2. Match the Correct Cracking Pressure

Sun Hydraulics provides multiple CXHA cracking-pressure options.

For example:

CXHA-XAN = 4 psi

CXHA-XBN = 15 psi

CXHA-XCN = 30 psi

These should not be treated as hydraulically identical configurations.(sunhydraulics.com)

3. Use 150–160 lb·ft Installation Torque

The specified CXHA installation torque is:

150–160 lb·ft

or approximately:

203–217 N·m

Use a calibrated torque wrench and clean the cavity before installation.(sunhydraulics.com)

4. Inspect Poppet and Seat for Leakage

When reverse leakage or pressure loss develops, inspect:

Poppet → Seat → Contamination → Seal Condition

The check valve’s sealing performance depends heavily on the condition of its internal sealing surfaces.(sunhydraulics.com)

5. Maintain Hydraulic Cleanliness

A clean hydraulic circuit helps prevent particle damage to the check-valve sealing interface.

Sun Hydraulics recommends approximately:

ISO 4406 Class 18/15 or better

with filtration performance around:

β10 ≥ 75

for suitable hydraulic-system cleanliness.

6. Verify Functional Equivalence Before Substitution

Do not replace CXHA-XAN with CXCD-XAN, CBDC, CWCA or MBGM solely because they are all Sun Hydraulics cartridge valves.

Their functions are different:

CXHA-XAN → Free Flow Check

CXCD-XAN → Relief + Free-Flow Check

CBDC → Counterbalance

CWCA → Vented Counterbalance

MBGM-XIN → Balanced Load Control