Micro Relief Valve

MH: Professional Micro Relief Valve Supplier

XAC MH MACHINING CO., LTD. , established in 1955, is a leading backbone enterprise within China's aerospace industry. The company has successfully developed China's first aviation gyroscopic instrument, its first missile autopilot system, its first aviation attitude and navigation system, and its first aviation flight director system. OEM ultra-precision machining for Medical, Energy, Space, Defense, Semiconductor, Oil & Gas etc.

Why Choose Us

Advanced Equipment

We are equipped with hundreds of world-leading manufacture and testing equipment from Germany, Switzerland, the United States, and Japan, like six-axis, five-axis, and four-axis CNC machines, sets of Zeiss CMM, high-precision testing benches etc.

ODM/OEM Services

From refractory metal materials to precision functional components and radar system products, we accept ODM/OEM orders. We provide a one-stop service from design to processing to surface treatment.

Quality Certifications

MH is certified by international standards including AS9100, ISO14001, and ISO45001, and possesses a CNAS-accredited laboratory and a comprehensive quality control system.

Global Market

Our products are exported to countries and regions including Europe, the United States, Russia, and Japan. Our products enjoy an excellent reputation among our customers.

Types of Micro Relief Valve

The Micro Relief Valve Produced by Our Company Mainly Include the Following Types:

Hydraulic Relief Valve

In hydraulic systems, relief valves are used to limit the system's maximum pressure, stabilize operating pressure, and protect pumps, actuators, and piping.

Cartridge Relief Valve

In aviation hydraulic systems, relief valves are used to limit the system's maximum pressure, absorb pressure peaks, and protect critical components.

High-Pressure Hydraulic Relief Valve

Our 10mm high-pressure hydraulic relief valve is designed for medium- and high-pressure hydraulic systems, maintaining stable operation within a pressure range of 0~31.5MPa, and is suitable for various industrial hydraulic applications.

Key Parameters

Product Type	Cartridge Relief Valve / Pressure Control Valve
Nominal Diameter (DN)	2.5 mm - 10mm
Opening Pressure	≥ 21 MPa
Minimum Flow Capacity	≥ 1.5 L/min
Working Medium	No. 15 Aviation Hydraulic Oil
Operating Temperature Range	-55℃ ~ +135℃

10mm High-Pressure Hydraulic Relief Valve

Materials of Micro Relief Valves

Relief valves are produced using a range of materials, including polysulfone and brass. A steam release pressure valve, for instance, might be made of cast aluminum with a polyester diaphragm, but a bronze valve is a great option for low-temperature applications. Different media and pressure ratings call for different materials. Applications needing the preservation of hygienic or sanitary conditions can employ stainless steel.

Relief valve seals and other comparable components use fluoro silicone, neoprene, propylene, and ethylene. The blending of different components results in a strong, long-lasting body that fully utilizes the sealing and elastic qualities of synthetic polymers and plastics. While not appropriate for every application, all-plastic valves can offer the advantage of being less prone to corrosion-related failure.

Advantages of Micro Relief Valve

Enhanced Safety:

Automatic overpressure protection helps prevent incidents by venting excess pressure before failures occur.

Equipment Protection:

Micro relief valves maintain the integrity and longevity of equipment by preventing overpressure conditions, which can cause wear and tear or damage.

Regulatory Compliance:

Using relief valves ensures compliance with industry safety standards and regulations, such as those set by ASME, API, and ISO.

Immediate Response:

Micro relief valves are designed to respond immediately to overpressure conditions, ensuring rapid pressure release when needed.

Versatility:

Micro relief valves are available in a variety of types and designs, making them versatile solutions for different applications.

Application of Micro Relief Valve

Industrial applications: Used in boilers, pressure vessels, pipelines, and other industrial equipment to prevent overpressure.

Marine applications: Used on ships, boats, and offshore platforms to prevent overpressure in fuel, hydraulic, and other pressurized systems.

Power-generating applications:

Used in power plants, including steam boilers, to prevent overpressure in the steam system.

Petroleum and gas applications:

Used in the petroleum and natural gas industry to prevent overpressure in pipelines and storage tanks.

Aerospace applications:

Used in aircraft and spacecraft to prevent overpressure in fuel, hydraulic, and other systems.

Installation Tips

Best Practices for System Positioning
Install relief valves as close as possible to the pressure source to minimize pressure spikes and ensure rapid response to overpressure conditions. Avoid installing relief valves in dead-end circuits or locations where thermal expansion could cause pressure buildup without flow circulation.

Ensure adequate clearance around the valve for maintenance access and consideration of fluid discharge during valve operation. The discharge port should connect to the reservoir or return line with minimal back pressure to prevent interference with valve operation.

Common Installation Mistakes to Avoid
Never install relief valves downstream of restrictive components like flow control valves or small orifices, as this can prevent proper valve operation. Avoid using relief valves as primary flow control devices, as this leads to energy waste and excessive heat generation. Don’t ignore valve orientation requirements—many relief valves must be installed in specific positions for proper operation.

Ensure proper pipe sizing for both inlet and outlet connections. Undersized connections can create pressure drops that affect valve performance and accuracy. Always use appropriate thread sealants or O-ring seals to prevent external leakage while avoiding contamination of the hydraulic fluid.contamination of the hydraulic fluid.

Customization Process

Communicate Needs

You can contact us via email at info@xacmfg.com to share your specific requirements, such as filtration grade, dimensions, or materials. This allows us to prepare an accurate quotation tailored to your needs.

Develop Solutions

Based on your requirements, we will create a customized solution and provide detailed design drawings along with a clear implementation plan.

Contract Confirmation

We will review the design plans and contract details together to ensure mutual understanding and agreement. This step guarantees clarity for both parties.

Manufacturing & Delivery

Once confirmed, we begin manufacturing and closely monitor progress to ensure timely production and delivery. This helps us maintain efficiency and meet deadlines.

Final Acceptance

We conduct a final acceptance inspection with you to confirm that the delivered products meet your quality standards and all technical specifications.

Ongoing Support

After delivery, we provide maintenance and technical support to ensure long-term reliability. This ensures your products consistently perform at their best.

Shipping and Delivery

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Our Certifications

Our manufacturing and quality systems meet strict aerospace standards

FAQ

Q: How do you set the pressure on a micro relief valve?

A: Technicians set the valve with calibrated gauges and follow manufacturer procedures. Always verify set pressure with a test bench or in-situ testing per applicable code.

Q: What is the difference between a micro relief valve and a micro safety valve?

A: Safety valves typically refer to rapid-opening valves for compressible fluids like steam and gas, often with a “popping” action. Relief valves may open more gradually and are widely used for liquids. Many standards use the terms interchangeably; selection should match the fluid, service, and code requirements.

Q: What information is needed to size a micro relief valve?

A: Key data include set pressure, allowable overpressure or build-up pressure, media type and properties, required relief rate (mass or volumetric flow), inlet temperature, backpressure, and connection sizes. Accurate sizing ensures proper capacity and reliable reseating.

Q: What are the common problems with micro relief valves and how can they be prevented?

A: Common problems with relief valves include leaks, failure to reach set pressure, premature opening, and failure to open. These issues can be caused by factors such as worn or damaged sealing components, improper calibration, debris accumulation, and internal component failure. This includes inspecting and replacing worn parts, cleaning the valve to remove debris, and ensuring proper calibration according to manufacturer guidelines.

Q: How does a hydraulic relief valve work?

A: A hydraulic relief valve works by automatically opening when system pressure exceeds a preset limit. The excess hydraulic fluid is diverted to the reservoir, reducing pressure and protecting system components. Once pressure returns to a safe level, the valve closes and normal operation resumes.

As one of the most professional relief valve manufacturers and suppliers in China, we're featured by quality products and good price. Please rest assured to wholesale high quality relief valve made in China here from our factory.

relief valve, 4mm Hydraulic Relief Valve, 2 5mm Cartridge Relief Valve for Aviation Hydraulic Systems