Safety and Control: Seamless Operation with
Declutchable Gearboxes
Declutchable gearboxes provide manual override for critical valve operations, ensuring safety and control during power outages or emergencies. Explore our reliable solutions.
In comparison to other options, the JIMAI Declutchable gearboxn provides the following benefits:
1. Worm Material: JIMAI utilizes ASTM5140 as the worm material, significantly enhancing the shaft durability.
2. Input shaft material: JIMAI utilizes ASTM5140 for the input shaft, significantly enhancing its hardness.
Worm treatment: The worm gear of the gearbox undergoes nitriding treatment, which increases its hardness and improves wear resistance, thereby extending its service life.
3. Gear Treatment: The worm gear has been subjected to phosphate coating, enhancing its resistance to corrosion.
4.3D file: JIMAI is capable of providing 3D files of declutchable gearboxes in various capacities, allowing customers to verify whether the declutchable gearbox is compatible with their valve in terms of space.
Use these quick selection paths to narrow down models before reviewing full specifications.
When manual override is required.
Mount on pneumatic actuator output.
Override torque must exceed valve load.
ISO 5211 interface compatibility.
Answer a few questions about your valve and application — we'll recommend matching Declutchable Gearbox models and highlight them in the list below.
Small size
Light in weight
Well-thought-out design
Contemporary style
Declutchable Gearbox Frequently Asked Questions
We have compiled a list of frequently asked questions to help you better understand declutchable gearboxes.
Find answers about manual override, pneumatic actuation, emergency operation, and more.
If you can't find the information you need, our team of experts is ready to help.
Browse related actuator and gearbox categories — image and overview at a glance.
View all product categories →Inspection and testing are performed according to the product type and applicable production procedure. Request the inspection scope for the selected model.
Torque, pressure, temperature, cycle-life, and protection ratings should be taken from the applicable model datasheet or test report, not from a category-wide claim.
Mounting interfaces and standards such as ISO 5211, NAMUR, VDI/VDE 3845, or other requirements are confirmed for each selected product and configuration.
Body, shaft, gear, seal, coating, and fastener materials vary by series. Confirm the bill of materials and environmental suitability before ordering.
CE, ATEX, IECEx, SIL, IP, and other documentation applies only where stated for the exact model. Certificate scope and revision should be verified during selection.
Warranty period, exclusions, spare-parts support, and technical documentation are confirmed in the quotation, order documents, or product-specific warranty terms.
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