Products Description

This worm gear fixed ball valve adopts a fixed ball structure matched with worm gear actuator, featuring stable torque transmission, easy operation and reliable sealing. Widely applied in petroleum, natural gas, chemical industry, power plant, water supply and drainage pipeline systems for medium cut-off and flow regulation. The worm gear drive reduces operating force effectively, enabling manual switch operation of large-diameter high-pressure valves without heavy labor.

Core Structural Advantages

Competitive advantage

The company conducted a competitive advantage analysis to identify its strengths and weaknesses compared to its rivals.

Fixed Ball Design

The ball body is fixed by upper and lower stems, eliminating medium pressure buoyancy offset. Stable sealing performance under high pressure, low friction and long service life.

Worm Gear Transmission Mechanism

Self-locking worm gear structure prevents accidental rotation of the ball caused by medium pressure impact; large transmission ratio, light handwheel operation, clear opening/closing position indication.

Double Sealing Optional Structure

Metal-to-metal hard seal / PTFE soft seal for selection. Soft seal for zero leakage; hard seal resistant to high temperature, wear and corrosive media.

Anti-blowout Valve Stem

Integral multi-step stem structure, equipped with anti-spraying groove, completely avoiding stem ejection under pipeline pressure.

Full Port / Reduced Port Optional

Full bore design minimizes flow resistance, little pressure loss, convenient pipeline pigging; reduced bore for compact installation and cost control.

Main Technical Parameters

comparison of product parameters

Nominal Diameter	DN50 ~ DN1200
Nominal Pressure	Class150 / Class300 / Class600 / PN16 / PN25 / PN40 / PN63 / PN100
Body Material	WCB, A105, CF8, CF8M, F304, F316, QT450 ductile iron
Ball Material	A105+Hardfacing Stellite, 304, 316
Seal Material	PTFE, RPTFE, Metal Stellite Alloy
Operating Temp	-196℃ ~ +550℃
Operation Mode	Worm gear handwheel (can match electric/pneumatic actuator conversion flange)
Connection End	Flange RF/BW/RTJ, Butt Weld, Thread
Test Standard	GB/T19672, ISO12224
Fire Safe Standard	API 607, API 6FA

Application Media

Natural gas, crude oil, refined oil, water, steam, acid & alkali corrosive liquid, chemical solvent, coal slurry, dust-containing high-viscosity medium.

Application Scenarios

Oil & gas transmission station, chemical processing pipeline, thermal power plant circulating water system, urban gas pipeline, metallurgy mining pipeline, seawater desalination project.

Product Features Summary

Worm gear self-locking, anti-vibration, no misoperation

Fixed ball withstands high pressure, stable sealing

Wide material range, adapt to extreme temperature & corrosive working conditions

Low maintenance, long service cycle, cost-effective for long-distance industrial pipelines

Packaging & Delivery

01.

Internal plastic protective cap for flange sealing surface

02.

Valve cavity filled with anti-rust oil

03.

Export wooden case packaging, moisture-proof and shock-resistant

04.

Complete accessories: operation handwheel, installation manual, test certificate, material report

Custom Service

Support customized pressure class, caliber, special material, anti-corrosion coating, extended stem for buried pipeline, gear box protective cover, remote position indicator.