Gearbox - XK-Range | Alfa Gear

Name: Gearbox - XK-Range | Alfa Gear
Brand: Alfa Gears
SKU: Gearbox - XK-Range | Alfa Gear

ALFA Gear XK Range Bevel Gearbox

The ALFA Gear XK Range is a multi-turn bevel gearbox designed for manual operation of gate, globe, and penstock valves. It is not intended for quarter-turn valves. Selection is based on applications requiring multiple stem turns and axial thrust transfer to the drive sleeve.

Technical Specifications

Sizes: XK-5, XK-10, XK-20, XK-40
Gear Ratios: 3:1, 4:1, 4:1, 6:1
Max Output Torque: 500 to 4,000 Nm
Output Axial Thrust: 120 to 460 kN
Weight: 12 to 74 kg
Flanges: ISO 5211 F10 to F30 (size dependent)
Max Stem Diameter: Ø32 to Ø70 mm

Construction & Materials

Body and cover: ductile cast iron JS1030 / GGG40. Drive sleeve: bronze alloy QAL9-4 / C95400 or ductile cast iron. Input shaft: C45 steel. Axial and needle bearings are used for stem thrust transfer.

Environment & Connection

Standard ingress protection: IP67; IP68 optional. Operating temperature: -50 to +150 °C. Valve mounting per EN ISO 5211 or DIN 3210 with coupling adaptation as required.

Selection Logic

Selection is based on:

Valve opening/closing torque
Stem axial thrust
Number of valve turns
Stem type: rising, non-rising, keyed, or custom
Available space for handwheel or extension

Applications

Used on isolation valves for water, steam, wastewater, cooling, penstocks, water treatment networks, and industrial plants with multi-turn valves. Media compatibility is determined by the valve; gearbox selection is based on torque, thrust, flange, and environmental requirements.

FAQ

When to select XK vs S or M Range?
Use XK for multi-turn valves requiring bevel gearboxes; not for quarter-turn worm gearboxes.

What is checked during maintenance?
Enclosure sealing, handwheel, coupling, stem axial load, drive sleeve wear, and increased operating torque.

Description

Alfa Gears XK Range are designed for the operation of Multi turn valves such as Gate and Globe valves. Our XK Range have Ductile Cast Iron (JS1030) Housing and feature high performance axial bearings. Drive sleeve material is Bronze alloy (C95400) or Ductile Cast Iron (JS1030)

4 sizes · up to 4000Nm Torque range available from stock · IP67 Enclosure · Bronze alloy Drive sleeve · High Performance axial bearings · High Strength C45 Steel Inputshaft

GENERAL TECHNICAL INFORMATION

Application

Alfa-Series quarter-turn worm gearboxes are applied to ball valves, butterfly valves, dampers and other 90° rotary valves. Alfa Gears hand wheels are with a variety models for optimal operation.

Operating Enviroment

Alfa Gears quarter-turn Worm gearboxes are with good mechanical quality and steady operating performance which apply to deal with variety climate and temperature. We strive to develop Alfa Gears valve gear operators to meet higher demands in the market.

Factory Standard

Enclosure: IP67 Standard (IP68 on request) Working Temperature: From -50°C to 150°C (-4°Fto248°F) Painting: Black RAL 9005, or according customer specification

Connect with Valve

The flange connecting to valve is according to EN ISO5211 or DIN3210 (Customization). including Sintered coupling system for various shaft connections. Please click on our link to download the Alfa Gears Dimensions or Alfa Gears Materials specification.