Gravity Fuel Cap

MH: Professional Gravity Fuel Cap 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.

Key Parameters

Product Type	Gravity Fuel Cap
Working Media	RP-3, JetA-1, JP-
Working Pressure	345 kPa
Temperature Range	-45℃ ~ +60℃
Weight	0.32 kg

Materials of Gravity Fuel Cap

Gravity fuel caps are typically made from durable, corrosion-resistant materials like aluminum, stainless steel or specialized steel. These materials ensure the cap can withstand temperature changes, fuel exposure, and environmental conditions. Some caps have additional sealing materials, such as rubber gaskets, to enhance durability.

Advantages of Gravity Fuel Cap

Tight Seal:

The gravity fuel cap ensures a secure and reliable seal, effectively preventing leaks and evaporative losses.

Easy Installation:

Designed with a simple structure, gravity fuel caps are quick to install, remove, and maintain.

Gravity Fuel Cap For RP-3 Fuel 0.035 MPa

Self-Closing Design:

The cap automatically closes when tilted or overturned, helping prevent fuel spills and improving operational safety.

Automatic Ventilation Function:

The gravity valve design helps balance the air pressure inside the fuel tank, thereby ensuring smooth fuel flow and stable engine performance.

Application of Gravity Fuel Cap

MH's gravity fuel caps are used on a multitude of aircraft (both winged and rotary) by countless customers worldwide.

Commercial & regional aviation

Military

General aviation

Business jets

Installation Requirements

Before installation, please ensure that the dimensions and thread specifications of the gravity fuel cap match the fuel tank's filler neck. Tighten the cap by hand or to the recommended torque to prevent it from coming loose.

Never overtighten the cap, as doing so may damage the threads or sealing components. Prior to use, verify that the sealing gasket is correctly seated and intact. Once installation is complete, fill the fuel tank and inspect the area around the seal to check for any leaks.

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

productcate-1-1

Our Certifications

Our manufacturing and quality systems meet strict aerospace standards

FAQ

Q: What is the purpose of an aircraft gravity fuel cap?

A: Aircraft gravity fuel caps are designed to seal fuel tanks securely, preventing fuel leakage and contamination while protecting the fuel from exposure to environmental elements. They also ensure that fuel tanks remain pressurized to an appropriate level to maintain proper fuel flow.

Q: Are aircraft gravity fuel caps standardized across different types of aircraft?

A: While certain design principles are common across gravity fuel caps, aircraft fuel caps are typically tailored to specific aircraft models or fuel tank designs. Variations can include cap size, sealing type, and venting requirements. Aircraft owners and operators must ensure they use fuel caps approved for their aircraft to maintain airworthiness and comply with safety regulations.

Q: What is the difference between a vented fuel cap and a non-vented fuel cap?

A: The primary types are vented and non-vented fuel caps. Vented caps allow for the necessary air exchange to equalize internal and external pressure, which is crucial for some fuel systems. Non-vented caps, on the other hand, are fully sealed and rely on separate tank venting systems. Caps may also vary by material and locking mechanism.

Q: How does venting in gravity fuel caps impact aircraft performance?

A: Proper venting in gravity fuel caps allows air to replace fuel as it's used, maintaining consistent pressure within the tank. Inadequate venting can lead to fuel starvation and engine failure. Venting is especially critical during high-altitude flights, where pressure differences are more pronounced.

Q: Why is it important to inspect gravity fuel caps regularly?

A: Regular inspection of fuel caps helps identify issues such as cracked gaskets, loose seals, and physical damage, all of which can lead to leaks or contamination. In addition, improper fitting caps or missing lanyards can result in caps detaching in flight, which poses safety hazards, including foreign object debris on runways and fuel spillage.

Q: What should be done if a gravity fuel cap is found missing or damaged before a flight?

A: If a gravity fuel cap is missing or damaged, it should be replaced with an appropriate cap approved for the aircraft model. Flying with an improperly sealed tank can lead to fuel loss, contamination, and engine performance issues. In some cases, an improperly secured fuel cap can result in in-flight fuel cap detachment, endangering flight safety.

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

Gravity Fuel Cap For RP 3 Fuel, Gravity Fuel Cap For RP 3 Fuel 0 035 MPa, Gravity Fuel Cap For RP 3 Fuel 210 KPa