Valve Gearboxes & Gear Operators

YOYAGE valve gearboxes cover part-turn and multi-turn designs for gate, butterfly, ball, plug, and globe valves, with torque from 216 to 850,000 Nm.

Product Range

Find the Right Valve Gearbox Series

New to valve gearboxes? Read what a valve gearbox is and how it works →

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

Showing 22 of 22 series.

Manual YOYAGE YZ manual worm valve gearbox for butterfly, ball and plug valves

YZ Worm Valve Gearbox

Standard Type
Part-turn (quarter-turn)
Gear Type
Worm
Ratio
34:1 – 67:1
Torque
500–6,825 Nm
Manual YOYAGE YZ-S manual worm valve gearbox for butterfly, ball and plug valves

YZ-S Worm Valve Gearbox

Standard Type
Part-turn (quarter-turn)
Gear Type
Worm
Ratio
78:1 – 19320:1
Torque
1,300–850,000 Nm
Electric YOYAGE YZ-D electric worm valve gearbox for butterfly, ball and plug valves

YZ-D Worm Valve Gearbox

Standard Type
Part-turn (quarter-turn)
Gear Type
Worm
Ratio
34:1 – 82:1
Torque
500–250,000 Nm
Electric YOYAGE YZ-SD electric worm valve gearbox for butterfly, ball and plug valves

YZ-SD Worm Valve Gearbox

Standard Type
Part-turn (quarter-turn)
Gear Type
Worm
Ratio
51:1 – 8860:1
Torque
500–850,000 Nm
Manual Ductile Iron Only YOYAGE HX heavy-duty manual worm valve gearbox for butterfly, ball and plug valves

HX Worm Valve Gearbox

Standard Type
Part-turn (quarter-turn)
Gear Type
Worm
Ratio
36:1 – 4170:1
Torque
670–220,000 Nm
Manual Ductile Iron Only YOYAGE HXH lightweight manual worm valve gearbox for butterfly, ball and plug valves

HXH Worm Valve Gearbox

Standard Type
Part-turn (quarter-turn)
Gear Type
Worm
Ratio
29:1 – 2895:1
Torque
260–120,000 Nm
Manual YOYAGE MY manual worm valve gearbox for butterfly, ball and plug 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 butterfly and ball 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 ball and butterfly 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 butterfly, ball and plug 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
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 SD manual / pneumatic declutchable worm valve gearbox for butterfly, ball and plug valves

SD Worm Valve Gearbox

Standard Type
Part-turn (quarter-turn)
Gear Type
Worm
Ratio
26:1 – 98:1
Torque
240–3,800 Nm
Manual / Pneumatic Declutchable YOYAGE MY-F series manual / pneumatic declutchable worm valve gearbox

MY-F Worm Valve Gearbox

Standard Type
Part-turn (quarter-turn)
Gear Type
Worm
Ratio
26:1 – 420:1
Torque
390–16,000 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
Product Knowledge

Valve Gearbox Types, Materials & Applications

A quick reference to the structures, gear trains, materials and service options behind the YOYAGE range.

Part-turn vs Multi-turn Valve Gearboxes

Part-turn gearboxes rotate the valve stem through 90° and are used on butterfly, ball and plug valves. Multi-turn gearboxes drive the stem through several revolutions and are used on gate and globe valves, where the disc is lifted or lowered to open and close.

Matching the structure to the valve is the first selection decision: a quarter-turn gearbox cannot operate a gate valve, and a multi-turn gearbox does not provide the defined 90° stop a quarter-turn valve needs. YOYAGE covers both, with part-turn torque from 240 to 850,000 Nm and multi-turn models from 216 to 170,000 Nm.

Part-turn Valve Gearbox Multi-turn Valve Gearbox Selection Guide

Worm, Bevel and Spur Gear Types

The gear train sets the torque multiplication, ratio and back-driving behaviour. Worm gearboxes are self-locking and are the standard choice for quarter-turn valves; bevel gearboxes turn the drive through 90° and are common on multi-turn gate and globe valves; spur gearboxes add another reduction stage for higher torque and higher ratios.

YOYAGE supplies all three gear types in manual valve gearbox and electric valve gearbox versions; the D suffix denotes electric actuator operation. Series such as the YZ-S combine a worm and spur stage in one housing to extend torque to 850,000 Nm.

Worm Gearbox Bevel Gearbox Spur 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 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 valve gearboxes and valve gear operator assemblies are used in water management, oil and gas, power generation and chemical processing, where reliable valve operation is required. Standard series cover 216 to 850,000 Nm across 22 part-turn and multi-turn series.

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

Valve Gearbox Questions & Answers

Selection, materials, customization and quotation questions we are asked most often.

Part-turn gearboxes turn the stem 90° for butterfly, ball and plug valves; multi-turn gearboxes turn the stem through multiple revolutions for gate and globe valves. The valve type always decides the structure. See the Selection Guide.

Butterfly, ball and plug valves use part-turn gearboxes, normally worm type. Gate and globe valves use multi-turn gearboxes in worm, bevel or spur design. If the valve is a special design, send the valve data and YOYAGE will confirm the matching model.

Confirm the valve's required output torque including the safety factor, then select the series whose maximum torque is above that value and closest to it. The ratio follows the allowed manual input effort or the electric actuator's input torque. Finally check the 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, stem dimensions, connection or flange standard, operation type (manual, electric or pneumatic) and quantity. If some data is missing, the YOYAGE team will review the application and recommend a suitable solution — Contact Us.

Need a Valve Gearbox Solution?

Send your valve type, size, and torque requirements to the YOYAGE team for selection support and quotation.

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