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Non-Return Valves (NRVs) – PE LOCK™

High-Performance Flow Control Solutions for Industrial Systems

Perfect Engineer’s PE LOCK™ Non-Return Valves (NRVs) are precision-engineered flow control devices designed to allow unidirectional flow and prevent backflow in pipelines, hydraulic lines, compressed air systems, and liquid transport lines. Built to deliver leak-proof performance and long service life, our NRVs are ideal for applications requiring fluid isolation, pressure retention, and back-surge protection across critical operations.

We offer an extensive range of NRVs in Stainless Steel, Brass, Carbon Steel, and Aluminium, available in varied sizes, end connections, pressure ratings, and crack pressures — tailored to meet the diverse demands of modern industries.

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What Is a Non-Return Valve (NRV)?

A Non-Return Valve, also known as a check valve, is a mechanical valve that permits fluid flow in one direction only and automatically prevents reverse flow. It operates without any manual control and relies on pressure differentials to open or close. This protects pumps, piping, and systems from pressure shocks, contamination, and damage.

Applications of PE LOCK Non-Return Valves

PE LOCK NRVs are trusted across a broad range of sectors:

Hydraulic circuits – Preventing oil return or pressure drop
Pneumatic systems – Avoiding backflow into compressors
Water treatment plants – Ensuring directional flow of treated water
Industrial piping systems – For isolation and surge protection
Pharmaceutical and food processing – Hygienic backflow prevention
Compressed air and vacuum lines – Efficient system safety
Chemical processing units – Preventing cross-contamination

Types of Non-Return Valves We Offer

We manufacture and supply a versatile range of NRVs to suit industry-specific flow demands:

Spring Loaded NRVs

Designed with a spring-loaded poppet mechanism for reliable sealing and quick response. Suitable for both low and high-pressure systems.

Inline Threaded Check Valves

Compact, robust inline valves with threaded ends. Easy to install and ideal for closed-loop hydraulic and pneumatic applications.

Flanged End Non-Return Valves

Heavy-duty check valves for pipeline integration. Available in sizes up to 4 inches and pressure classes up to 2500 PSI.

Dual Plate / Wafer-Type NRVs

Space-saving design for large pipelines with minimal pressure drop and efficient sealing.

Ball Type NRVs

Best for low-viscosity fluids and clean service environments.

Key Features of PE LOCK™ NRVs

100% Leak-Proof Design High-quality sealing surfaces and precision-ground components eliminate leakage.
Low Crack Pressure Options Valves open with minimal pressure, ensuring smooth flow without loss.
Backflow Protection Prevents contamination, pump reversal, or equipment damage.
Corrosion-Resistant Materials Available in SS 304, SS 316, Brass, and Alloy Steel for aggressive environments.
Easy Installation Available in threaded (BSP/NPT), flanged, or welded connections.
Customizable Designs Offered in multiple cracking pressures, body configurations, and flow directions.

Technical Specifications

Parameter	Description
Size Range	1/8” to 4” (Threaded), DN15 to DN100 (Flanged)
Material	SS 304, SS 316, Brass, CS, Aluminium
Pressure Rating	Up to 6000 PSI / 400 bar
End Connection	NPT, BSP, Socket Weld, Flanged
Temperature Range	-20°C to +220°C
Crack Pressure	0.1 to 5 bar (custom available)
Flow Direction	Unidirectional
Standards	ASME B16.34, ISO 9001, CE Marked (on request)

Contact Us for Pricing & OEM Support

Call

+91-9004860491

E-mail

[email protected]

Website

www.perfectqrc.com

Why Choose PE LOCK™ Non-Return Valves?

In-House Manufacturing – All valves are produced at our ISO-certified plant with CNC and testing integration.
Custom Engineering – We design valves to meet your exact pressure, media, and dimensional requirements.
Prompt Delivery – Ready-to-dispatch inventory and efficient supply chain for both domestic and export markets.
OEM/ODM Supply – We support branding and custom production for industrial buyers and resellers.

Industries We Serve

Oil & Gas
Water & Wastewater
Pharmaceuticals
HVAC & Building Systems
Marine & Offshore
Food & Beverage
Chemicals
Fertilizers
Process Automation

Ordering & Support

Submit your RFQ with specifications including material, size, flow direction, end connection, and pressure rating. Our team will assist with product matching, price quotation, and logistics options.

PE LOCK NRVs at a Glance

Made in India

100% Tested for Pressure & Performance

Interchangeable with Major Global Brands

Ideal for OEMs, EPCs, and Industrial Maintenance

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