Select a gearbox
Start with motion, torque, mounting and operating conditions.
Open selection tools →Engineering Selection · RFQ Preparation · Supplier Coordination
Turn valve torque, mounting, environment and documentation requirements into a clear gearbox specification. Compare solution paths, use free engineering calculators and send one structured RFQ for supplier confirmation.
Engineering resources
Move from valve requirements to a documented gearbox enquiry with practical selection tools and downloadable records.
Start with motion, torque, mounting and operating conditions.
Open selection tools →Record the flange, stem and coupling before assembly.
View measurement guide →Print an RFQ worksheet, measurement record or inspection checklist.
Get the worksheets →Industry Solutions
Engineered torque, mounting and environmental protection matched to your application — not just a catalog part number.
Reliable torques for municipal and desalination valves DN50–DN2000.
API 6D-rated operators for upstream, midstream and pipeline service.
Thermal, nuclear and hydro plant valve gear with extended duty cycles.
Heavy-duty units for slurry, tailings and high-abrasion valve lines.
Class-approved gearboxes for shipboard and offshore platform valves.
Corrosion-resistant finishes for aggressive media and petrochemical plants.
Actuator adapters and overrides for integrated flow-control systems.
High-torque multi-turn gearboxes for penstock and dam gate valves.
Product Lines
Quarter-turn, multi-turn and custom gear units — configurable to ISO 5211 / 5210 flanges, stem dimensions and environmental ratings.
Torque: match valve data
Interface: verify drawing
Protection: require evidence
Self-locking worm gear units for ball, butterfly and plug valves.
Torque and thrust inputs
Ratio and duty review
ISO 5210 interface check
High-ratio bevel units for gate, globe and check valves.
Declutching sequence
Position indication
Locking requirement
Define the manual-override, disengagement, indication and locking requirements for supplier confirmation.
Interface dimensions
Actuator model check
Stem coupling drawing
Define bracket, coupling and actuator-interface dimensions against controlled drawings.
NAMUR interface
Assembly and test scope
Hardware material
Specify bracket, coupling, hardware, assembly and test requirements for the selected pneumatic package.
Environment and duty
First-article plan
NDA and IP terms
Prepare requirements for special environments; suitability remains subject to supplier evidence.
Why Use the Platform
The value is a clearer technical request and a visible evidence checklist—not an invented factory history.
Start with valve torque, interface, environment, duty and quantity.
Calculator formulas and safety boundaries are shown beside each result.
Ratings, drawings, materials, QA records, lead time and price belong in the quotation.
Factory, certificate and customer-project claims remain unpublished until verified.
Supplier Qualification
A future production partner is assessed against the actual quoted scope. The checklist below is a buyer requirement, not a claim that ValveWormGear owns a factory.
Application Planning Scenarios
These are engineering planning examples, not customer case studies. Final products, suppliers, test records and delivery commitments are confirmed only in a written quotation.
Define break-to-open torque, safety factor, ISO mounting interface, travel stops, environmental protection and project documentation before requesting a supplier match.
Compare coating, housing material, ingress protection, handwheel effort and maintenance access for wet or coastal installations without inventing a project reference.
Published Technical Resources
Understand how ratio, efficiency and input effort affect available output torque.
Translate site exposure into an ingress-protection requirement for supplier confirmation.
Compare duty, access, speed, maintenance and automation requirements.
Tools & RFQ Preparation
Public certificates, model drawings and catalog files will only be added after their source and revision are verified.
FAQ
Lead time depends on the selected supplier, model availability, customization, inspection scope and destination. We request a written production and shipment schedule for every quotation; no standard lead time is assumed before supplier confirmation.
Minimum order quantity depends on the selected supplier and whether the request is for a sample, a standard unit or a custom/private-label program. State your required quantity in the RFQ and we will confirm the applicable MOQ in writing.
Yes — over 60% of our output ships under customer brands. Custom nameplates, paint codes and packaging are available. All IP and drawings are protected under NDA.