MTQY 1/4 NPT Air Compressor Relief Valve – Brass Dual Pack 175 PSI

Description

Product Overview

The MTQY 1/4 inch NPT pressure relief valve is engineered to deliver dependable over‑pressure protection for a wide range of air compressors and related equipment. Each valve is fabricated from high‑grade brass with a stainless‑steel sealing element, providing excellent corrosion resistance, high‑temperature ductility, and low magnetic permeability. Rated for a maximum operating pressure of 175 PSI, the valve automatically opens when system pressure exceeds the preset threshold, allowing excess air, water, or oil to be safely discharged. The dual‑pack configuration supplies two identical valves, ensuring you have a spare on hand for routine maintenance or unexpected replacements. Precise NPT threading guarantees a secure, leak‑free connection, while the compact 1/4 inch size fits seamlessly into standard compressor housings without requiring extensive modifications. Designed for temperature ranges from -65 °F to +250 °F, these valves maintain consistent performance in both cold‑room environments and high‑heat industrial applications.

Usage

These relief valves are ideal for a variety of settings where pressure control is critical. In industrial workshops, they protect large‑capacity compressors used for pneumatic tools, preventing damage caused by pressure spikes. In automotive service bays, the valves safeguard air‑powered lifts and paint spray systems by venting excess pressure that could otherwise lead to equipment failure or safety hazards. For hobbyists and DIY enthusiasts, the compact design makes them perfect for home‑based projects such as small air‑tool kits, aquarium air pumps, and portable compressors used in construction or landscaping. The valves also perform reliably in water‑discharge applications, allowing condensate or moisture to be expelled without compromising system integrity. Because the valves are constructed from brass, they resist rust and chemical corrosion, making them suitable for environments where oil or coolant exposure is common. Installation is straightforward: simply thread the valve onto the existing NPT port, apply a thread sealant if desired, and verify operation by gradually increasing system pressure until the valve releases.

Why Choose Us

Choosing the MTQY relief valve means selecting a product backed by rigorous quality control and a commitment to durability. Each valve undergoes a multi‑stage testing process that includes pressure cycling, temperature endurance, and leak detection to ensure it meets or exceeds industry standards. The brass construction not only offers superior resistance to corrosion but also provides a smooth, low‑friction surface that reduces wear over time, extending the service life of the valve far beyond typical alternatives. Our dual‑pack offering delivers added value by providing a spare part, reducing downtime when a valve needs replacement. Additionally, MTQY offers responsive customer support and a clear warranty policy, giving you confidence that any issues will be addressed promptly. The design incorporates a spring‑loaded mechanism that reacts quickly to pressure changes, delivering consistent venting performance without the need for manual adjustment. This reliability translates into lower maintenance costs and increased safety for operators who rely on stable compressor performance day after day.

Key Features

• Robust brass construction ensures long‑term corrosion resistance and durability
• Precise 1/4 inch NPT threading provides a secure, leak‑free fit
• Rated for 175 PSI, automatically releases excess pressure to protect equipment
• Operates safely across a wide temperature range from -65 °F to +250 °F
• Includes two valves per pack and responsive customer support for peace of mind

FAQ

What size NPT thread does the valve use?

The valve features a standard 1/4 inch NPT (National Pipe Thread) connection, compatible with most compressor ports and fittings that use this common size.

Can the valve be used for both air and water discharge?

Yes, the valve is designed to safely vent air, water, or oil when system pressure exceeds the set limit, making it versatile for a variety of compressor applications.

Is any additional sealing material required during installation?

While the brass threads provide a tight seal, applying a compatible thread sealant or Teflon tape can further ensure a leak‑free connection, especially in high‑pressure or moisture‑rich environments.

What is the warranty period for this product?

MTQY offers a one‑year limited warranty covering manufacturing defects, giving you confidence in the product’s quality and durability.

How do I know when the valve has opened?

When the internal spring releases due to excess pressure, you will hear a distinct hissing sound as air or fluid is vented. Visual inspection of the vent port can also confirm operation.