China Flanged Gate Valve Manufacturers Suppliers Factory - Customized Flanged Gate Valve

Fire Sprinkler System
- Standard Response Fire Sprinkler
  - FM Approved Standard Response Fire Sprinklers For Reliable Fire Protection
- Quick Response Fire Sprinkler
Fire Protection Valve
- Flanged Gate Valve
- Grooved Gate Valve
Fire Monitor
- Fixed Manual Fire Monitor
- Anti-Explosion Fire Monitor

Your Professional Flanged Gate Valve Supplier

Founded in 2025, NONFIR is a professional manufacturer dedicated to FM/UL certified fire protection equipment, including automatic fire sprinklers, gate valves, and system components. NONFIR offers FM/UL certified fire protection products, specializing in sprinklers (pendent, upright, sidewall), gate valves, and other certified fire protection equipment, all manufactured for durability, reliability, and high performance.

Fire Flange OS&Y Gate Valve - Professional Fire Protectio...
This fire flange outside screw & yoke (OS&Y) gate valve is a professional control component for fire protection systems. With flange connection and rising stem design, it ensures tight sealing, corrosion resistance and easy operation,
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Flanged OS&Y Gate Valve For Fire Protection Systems
The FM/UL certified flanged OS&Y gate valve is designed for reliable shut-off control in fire protection systems. It features a robust body construction and rising stem (OS&Y) design, providing clear visual indication of valve position.
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Fire Protection Gate Valves
Nonfir fire protection gate valves are FM/UL certified, high-strength valves designed for fast, reliable water control in fire safety systems.Nonfir fire protection gate valves are FM/UL certified, high-strength valves designed for
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Os Y Gate Valve
The Nonfir OS&Y Gate Valve, with its reliable exposed-stem design and FM/UL certifications, ensures safe and verifiable flow control for critical applications.In fire protection and industrial piping systems, the Nonfir OS&Y Gate Valveis a
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FM Approved Valve
Nonfir FM approved valves deliver reliable, FM/UL certified performance for fire protection and industrial systems, ensuring safe and compliant operation in critical applications.Nonfir valves are high-quality gate valves rigorously tested
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Fire Fighting Gate Valve
Nonfir fire fighting gate valves are FM/UL certified, high-flow valves designed for reliable, leak-free water control in emergency firefighting and municipal fire systems.Nonfir valves are specially designed for firefighting operations,
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Cast Iron Gate Valve
Nonfir cast iron gate valves provide FM/UL certified reliability, delivering durable, corrosion-resistant performance for firefighting and industrial water control systems.Nonfir valves combine high-strength cast iron construction with
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Gate Valve for Fire Protection System
Nonfir gate valve for fire protection system ensures FM/UL-certified, leak-free control with fast system response and stable pressure performance for integrated fire protection networks.The Nonfir valve is engineered as a core control
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Why Choose Us

Our Certificate

NONFIR products are FM and GB certified, ensuring reliable, high-quality, and compliant fire protection solutions, backed by multiple patents.

Production Market

NONFIR products are sold across China and exported to the Middle East, Southeast Asia, Russia, South America, and other countries, achieving an annual sales volume of about RMB 301.26 million.

Professional Team

Our professional team confirms all customer requirements before production, ensures sprinklers, valves, and other fire protection products meet strict quality standards during manufacturing, and offers dedicated after-sales support for installation guidance, troubleshooting, and product issues, guaranteeing reliable solutions and full customer satisfaction.

Our Factory

NONFIR operates a modern facility with over 115 employees and a fully automated production line for FM/UL certified fire sprinklers, ensuring precise, high-quality, and reliable fire protection products for industrial, commercial, and high-rise applications worldwide.

Characteristics Of Flanged Gate Valve

Flanged gate valve does not need maintenance, adjustment and lubrication, easy installation, low operating cost, long-term reliable operation, surface spraying plastic technology, beautiful color, no external leakage, etc. The valve body is welded, making the valve light and easy to insulate, and the adjustment mechanism is very simple. The operating handle can be detached and flipped.

Since the valve seat is composed of carbon fiber reinforced PTFE sealing ring and disc spring, it has strong adaptability to changes in pressure and temperature, and will not produce any sliding discharge in the pressure and temperature range on the label.

There are advanced computer detection and tracking detection in the process of sphere processing, so the processing accuracy of steel balls is high.

Since the material of the flanged gate valve body is the same as that of the pipeline, there will be no uneven stress, the pipeline will not be deformed due to earthquakes and vehicles passing through the ground, and the pipeline is resistant to aging.

Large-diameter flanged gate valve, equal-diameter variable-diameter channel, fixed ball floating ball, double piston sealing system, automatic control, injection sealant type bearing.

In order to prevent static electricity, steel balls and springs are installed between the valve stem and the ball and between the valve stem and the stuffing box, which can maintain the conduction of all parts of the lined ball valve and the valve body, and discharge static electricity in the area where the current passes.

The valve stem anti-drop function is due to the total force generated by the valve stem affected by the pressure in the valve, so the design of the flanged gate valve stem is to prevent the structure from disconnecting.

Use a low-friction thrust washer to push the pressure onto the valve stem so that the valve stem only acts as a torque transmission.

Product Paramenters

Item	Specification
Type	Flanged or Grooved OS&Y
Certificate	FM/UL
Standard	EN1171 / ASME B16.1 / AWWA C515
Connection	BS EN1092-2 Flanged / ANSI 125-150 / AWWA C606 Grooved
Testing	Factory hydrostatic test at 24–450 bar
Temperature range	0 °C – 100 °C
Working pressure	300–350 psi
Size range	2 – 12 in (DN50 – DN300)

Types of Flanged Gate Valve

Flange Check Valve

This flange-end valve contains a disc that is pushed when material flows in the right direction, allowing it to pass through the pipes.

Flange Globe Valve

They feature flanged ends and use a moveable disc or plug attached to a stem that moves up and down against the seat to start, stop, or control the flow rate.

Butterfly Valve Flange Type

The valve opens when the disc’s edges line up (parallel) with the pipe flow and closes when the disc’s face turns across (perpendicular to the flow) the pipe path.

Flange Ball Valve

Fluid flows quickly while the hole and pipe are lined up; rotating the ball 90 degrees prevents flow entirely.

Key Components of Flanged Gate Valve

Body:

Main outer shell housing all internal parts; connects to the piping system.

Gate (Disc):

Moves up and down to control flow; blocks flow when down.

Stem:

Shaft connecting the gate to the handwheel or actuator, moving the gate.

Handwheel/Actuator:

Manual or automated control to move the stem and gate.

Seat:

Sealing surface where the gate contacts the valve body when closed.

Valve Ports (Inlet and Outlet):

Openings for fluid entry and exit.

Flanged Gate Valve Installation

Before installing the valve, please check the valve model, connection size and pay attention to the flow dirction of medium to ensure all are in accordance with the valve requirements.

When installing the valve, you must reserve the necessary space for the valve's operation.

The wiring of the drive device shall be carried out according to the wiring diagram.

Before installation, check the valve cavity and sealing surface and other parts, make sure there's no dirt, sand etc.

Evenly fasten the bolts at each connection site.

Check the tightness of the packing, not only to ensure the sealing of packing, but also to ensure that the wedge can open/close easily.

The gate valve must be maintained regularly and must not collide and squeeze at will, so as not to affect the seal.

Maintain Of Flanged Gate Valve

First remove the pressure before and after the ball valve, and then the ball valve can be disassembled and differentiated. When the ball valve body is reinstalled, it is necessary to tighten the bolts symmetrically, gradually and evenly.

The cleaning agent should be compatible with the rubber parts, plastic parts, metal parts and working medium (such as gas) in the flanged gate valve ball valve. When the working medium is gas, the metal parts can be cleaned with gasoline, and the non-metal parts can be cleaned with pure water or alcohol.

The differentiated individual parts can be cleaned by dipping. Non-metallic parts should be removed from the cleaning agent immediately after cleaning, and should not be soaked for a long time.

After cleaning, it needs to be installed after the cleaning agent on the wall to be washed has evaporated (it can be wiped with a silk cloth not soaked in the cleaning agent), but it should not be put on hold for a long time, otherwise it will rust and be polluted by dust.

The new parts also need to be cleaned before installation. When installing the flanged gate valve, no metal debris, fibers, grease (regularly used), dust, other impurities, foreign objects, etc. should be polluted, adhered or stayed on the surface of the parts or into the lumen.

Application of Flanged Gate Valve

Oil and gas production: Flanged gate valves are used in the oil and gas industry to control the flow of fluids in pipelines, as well as in oil and gas wells.

Chemical processing: These valves are used to control the flow of various chemicals in chemical processing plants.

Water treatment: Flanged gate valves are used in water treatment plants to control the flow of water through various stages of treatment.

Power generation: These valves are used in power plants to control the flow of steam or other fluids in the power generation process.

Mining: Flanged gate valves are used in the mining industry to control the flow of fluids in processing plants and to control the flow of slurry in mining operations.

Procurement Process

Consultation and Quotation

Please inform us of your flange gate valve requirements. Our experts will provide tailored advice and a detailed quotation.

Manufacturing and Quality Control

Your flange gate valve order will be manufactured to the highest standards and undergo rigorous quality checks throughout the process.

Global Shipping and Support

We offer reliable global shipping and professional after-sales support to ensure your satisfaction with all flange gate valve orders.

FAQ

Q: What is the application of gate valve?

A: Gate valves are used to isolate specific areas of the water supply network during maintenance, repair works, new installations, as well as to reroute water flow throughout the pipeline.

Q: What are the advantages of using gate valves?

A: Advantages of gate valves bidirectional flow: these valves can be used in both directions, making them versatile. full bore design: the unobstructed bore ensures no turbulence, which is ideal for high-velocity fluids. less space: gate valves require relatively less installation space than a ball valve.

Q: What is the most common and widely used gate valve?

A: Solid wedge gate valves (or plain wedge valves) tend to be the most widely used. They are often among the simplest and cheapest options but offer good mechanical strength. They are broadly suitable for nearly all types of fluid media.

Q: Can a gate valve be used for throttling?

A: Gate valves are not intended for throttling. They are designed such that media flowing at high velocity can vibrate and quickly erode or tear a partially-open valve disc off its seat. In a pinch, gate valves should only be used for throttling when the gate is 90% closed.

Q: Are gate valves bidirectional?

A: Bi-Directional Flow Control- Gate valves are designed to allow bidirectional flow, meaning they can regulate the flow in either direction. This versatility makes them suitable for applications where the fluid may need to change direction or reverse flow.

As one of the leading flanged gate valve manufacturers and suppliers in China, we offer a wide range of products with superior quality. Please feel free to buy customized flanged gate valve made in China here from our factory. For price consultation, contact us.

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