Multi-turn Valve Gearboxes & Rising-Stem Gear Operators

YOYAGE multi-turn gearboxes turn the valve stem through multiple revolutions for gate and globe valves, with bevel, spur and dual-structure worm series covering 216 to 170,000 Nm in manual, electric, pneumatic declutchable and 3-way input versions.

Product Range

Find the Right Multi-turn Valve Gearbox Series

Standard Type
All Gearboxes Part-turn Gearboxes Multi-turn Gearboxes
Applicable Valve Type
For Gate Valve For Globe Valve
Gear Type
Operation Type
Nm Show series with max torque above this value.

Showing 14 of 14 series.

Manual YOYAGE CK manual bevel valve gearbox for gate and globe valves

CK Bevel Valve Gearbox

Standard Type
Multi-turn
Gear Type
Bevel
Ratio
2.6:1 – 7.1:1
Torque
350–6,800 Nm
Manual / Pneumatic Declutchable YOYAGE BA-Q series manual / pneumatic declutchable multi-turn bevel valve gearbox

BA-Q Bevel Valve Gearbox

Standard Type
Multi-turn
Gear Type
Bevel
Ratio
2.35:1 – 23:1
Torque
360–6,000 Nm
Manual YOYAGE MY manual worm valve gearbox for gate and globe valves

MY Worm Valve Gearbox

Standard Type
Part-turn / Multi-turn
Gear Type
Worm
Ratio
24:1 – 68:1
Torque
300–8,500 Nm
Manual YOYAGE MY-1S manual worm valve gearbox for gate and globe valves

MY-1S Worm Valve Gearbox

Standard Type
Part-turn / Multi-turn
Gear Type
Worm
Ratio
72:1 – 5280:1
Torque
1,000–170,000 Nm
Electric YOYAGE MY-D electric worm valve gearbox for gate and globe valves

MY-D Worm Valve Gearbox

Standard Type
Part-turn / Multi-turn
Gear Type
Worm
Ratio
33:1 – 80:1
Torque
800–150,000 Nm
Electric YOYAGE MY-1SD electric worm valve gearbox for gate and globe valves

MY-1SD Worm Valve Gearbox

Standard Type
Part-turn / Multi-turn
Gear Type
Worm
Ratio
50:1 – 1248:1
Torque
300–150,000 Nm
Product Knowledge

Multi-turn Valve Gearbox Structure, Gear Trains & Applications

A quick reference to the structure, bevel, spur and worm gear trains, materials and service options behind the YOYAGE multi-turn range.

Multi-turn Valve Gearbox Structure and Multi-Revolution Travel

A multi-turn valve gearbox turns the valve stem through multiple revolutions to lift or lower the disc, so the valve opening height follows the stem travel. It is the correct structure for gate and globe valves, where several turns of the stem are needed between fully open and fully closed.

The valve type decides the structure before any other decision: rising-stem valves need a multi-turn gearbox, and the required output torque together with the thrust load then sets the series size. YOYAGE multi-turn gearboxes cover 216 to 170,000 Nm across the 14 series listed on this page.

Multi-turn Valve Gearbox Selection Guide

Bevel, Spur and Worm Gear Trains

Bevel gearboxes turn the drive through 90° and multiply the input torque, which makes them the common structure for multi-turn gate and globe valve gearboxes. Spur gearboxes add a further reduction stage for higher ratios and higher output torque, while the dual-structure MY family uses a worm gear train that can be configured for part-turn or multi-turn service.

Series such as MY-V-1S and CK-1S extend the bevel range to 100,000 Nm and 26,000 Nm, and the 3-way input RK-DZ accepts manual, electric or pneumatic input through the same bevel housing. Manual series use a handwheel; the D suffix denotes electric actuator input; pneumatic declutchable series allow manual operation with an actuator mounted.

Bevel Gearbox Spur Gearbox Worm Gearbox

Housing Materials, Coating and IP Protection

Housing material follows the service environment: ductile iron for general industrial duty, WCB cast steel for higher pressure and temperature, CF8/CF8M stainless steel for corrosive media, and LCC/LCB/LC1 low-temperature cast steel for cold service.

Protection is IP67 or IP65 as standard, with IP68 available for buried or frequently flooded installations. C3 and C5 coating systems are available for outdoor, coastal and corrosive sites.

Ductile Iron WCB Cast Steel CF8 / CF8M Stainless LCC / LCB Low-temp IP Protection Coating System

Applications, Customization and Quality Control

YOYAGE multi-turn valve gearboxes and gear operators are used in water management, oil and gas, power generation and chemical processing, where reliable rising-stem valve operation is required. The 14 series here cover 216 to 170,000 Nm in manual, electric, pneumatic declutchable and 3-way input versions.

Beyond the standard range, gear ratios, handwheel and chainwheel sizes, stem bores, flange standards and materials can be adapted to the valve, and every custom design is confirmed by drawings before production. Products are torque-tested and low-temperature tested in an ISO 9001-certified plant; all products carry the CE mark.

Industries Custom Solutions Quality Control Certifications
FAQ

Multi-turn Valve Gearbox Questions & Answers

Selection, torque and thrust, materials, customization and quotation questions we are asked most often about multi-turn gearboxes.

Gate and globe valves, which open and close by turning the stem through multiple revolutions and lifting or lowering the disc. A multi-turn gearbox matches that travel, so the valve type always decides the structure first.

The 14 series on this page cover 216 to 170,000 Nm with ratios from 2.3:1 to 5280:1. Manual, electric actuator input (D suffix), pneumatic declutchable and 3-way input versions are available; select the series whose maximum torque is above the valve's required torque including the safety factor.

Confirm the valve's required output torque including the safety factor, and for gate valves also check the thrust load. The ratio follows the allowed manual input effort or the electric actuator's input torque. Finally check the ISO 5210 mounting flange and stem dimensions against the valve.

Standard housings are ductile iron, with WCB cast steel, CF8/CF8M stainless steel and LCC/LCB/LC1 low-temperature steel available for other service conditions. Protection is IP67 as standard with IP68 optional, and C3 or C5 coating can be specified for outdoor and corrosive environments.

Yes. Gear ratios, handwheel and chainwheel sizes, stem bores, flange standards, housing materials and coating systems can be adapted, and every custom gearbox is confirmed by drawings before production starts. See Custom Solutions.

Send the valve type and size, required torque and thrust, stem dimensions, connection or flange standard, operation type (manual, electric, pneumatic declutchable or 3-way input) and quantity. If some data is missing, the YOYAGE team will review the application and recommend a suitable solution — Contact Us.

Need a Multi-turn Valve Gearbox Solution?

Send your valve type, size, torque and thrust requirements to the YOYAGE team for multi-turn gearbox selection support and quotation.

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