Flat gate valve with pilot hole

Plate gate valve is a simple structure, sealing performance superior valve, widely used in petroleum, chemical, electric power, metallurgy and municipal engineering and other working conditions. The valve is suitable for water, steam, oil, gas and slightly corrosive media, with good pressure and corrosion resistance. Plate gate valve through the plane gate up and down to realize the fluid cut off and connection, compact structure, opening and closing flexible, small flow resistance, suitable for fully open or fully closed conditions. Advantages of the product include reliable sealing, easy operation, wear resistance, long service life and easy maintenance. Flat plate gate valve supports manual, electric and pneumatic drive methods to meet different automation control needs. Its main function is to realize the rapid cut-off and connection of the medium in the pipeline system, to ensure the safe and stable operation of the system. Because of its high efficiency, durability and excellent performance, flat gate valve has become an important valve equipment in industrial and municipal pipeline network.
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Flat gate valve with pilot hole
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Flat gate valve with pilot hole

Model: Z43W/F, Z543W/F
Subtitle：Pressure balanced pipeline gate valve
The Flat Plate Gate Valve with Deflector Orifice is a high-performance solution designed for high-pressure, high-temperature applications in oil and gas pipelines, water supply and industrial processes. Designed with a flat gate valve with pilot orifice to ensure pressure balance, smooth operation and tight sealing, the valve is ideal for systems requiring pressure relief and efficient flow control...
Tags:High pressure gate valve
Classification:Flat Gate Valves
Working conditions:chemical plant, power plants, Liquefied Natural Gas (LNG), petrochemical industry
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Product Overview

The Flat Plate Gate Valve with Deflector Orifice is a high-performance solution designed for high-pressure, high-temperature applications in oil and gas pipelines, water supply and industrial processes. The valve's flat gate with pilot orifice design ensures pressure balance, smooth operation and tight sealing, making it ideal for systems requiring pressure relief and efficient flow control.

working condition

Oil and gas: pipeline isolation and wellhead control.

Water supply: mains isolation and flow control.

Industrial processes: high pressure fluid handling in chemical and petrochemical plants.

Power generation: isolation of steam and feedwater in power plants.

Main features

Design of flat gate valve with pilot hole
Pressure balance: The guide hole ensures pressure balance at both ends of the gate valve to ensure smooth operation.
Good sealing performance: ANSI Class VI leakage rate for critical shutdown applications.
Smooth operation: pressure-balanced design with low operating torque.

Valve Structure
Valve body materials: carbon steel (WCB), 316L stainless steel (CF8M), duplex stainless steel (UNS S32205).
Gate Valve Material: 13% chrome stainless steel, Stellite alloy 6, or nickel-plated carbon steel.
Sealing: Graphite, PTFE or metal-to-metal (-40°C to 450°C).

Flow Rate Characteristics
Full bore design: minimum flow restriction and maximum efficiency.
Flow coefficient (Cv): 500-5000 (DN50-DN600).
Pressure drop: Streamlined runner with minimal pressure drop.

Operating characteristics
Low-torque operation: easy to open and close with little effort.
Bi-directional sealing: effective sealing in both directions.
Fire resistant design: API 607 certified for fire resistant applications.

Operational Advantages

Pressure Balancing: Deflector holes ensure smooth operation under high pressure.

Tight seal: ANSI Class VI leakage rate for critical applications.

Low torque: smooth operation and labor saving.

Fire safe: API 607 certified for fire safe applications.

Comparison with flat gate valve without pilot hole

specificitiesFlat gate valve with pilot holeFlat gate valve without pilot hole
pressure balanceYes (deflector holes)clogged
Operating torqueLower due to pressure equalizationslightly above
seal upBidirectional, metal-to-metalBidirectional, metal-to-metal
safeguardLow (fewer components)Low (fewer components)

Selection Guide

High pressure: 1500 or 2500 class for extreme conditions.

Corrosive media: Choose 316L bodies and Stellite 6 internals.

High cycle: Nickel plated gate with over 10,000 cycles.

Fire protection applications: Select API 607 certified valves.

Medium of use

petrochemical, vapor

working condition

chemical plant, power plants, Liquefied Natural Gas (LNG), petrochemical industry, High Temperature High Pressure Steam System

summarize

Flat plate gate valves with pilot holes are reliable and efficient solutions for high pressure, high temperature applications where pressure equalization and tight sealing are required. Its robust design, low maintenance requirements and fire protection certification make it ideal for oil and gas, water supply and industrial processes. With optional customization and an extended 5-year warranty, it ensures long-term operational efficiency and cost savings.

Product Parameters

Nominal diameterDN50-DN600 (2"-24")
Nominal pressurePN16-PN420 (Class 150-2500)
Applicable temperature-40°C to 450°C (depending on seal)
Flow coefficient (Cv)500-5000
leakage rateANSI Class VI (standard)
connection methodFlanged (RF/RTJ), Welded (BW)
Valve MaterialWCB, 316L SS (CF8M), duplex stainless steel (UNS S32205)
Valve material13% Cr Stainless steel, Stellite alloy 6, Nickel plated carbon steel
sealing materialGraphite, PTFE, metal-to-metal
Cycle life10,000+ cycles (standard)
Test StandardsHydrostatic pressure: API 598; Leakage: ISO 5208

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