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MASTER LOCK S3921 Cable-Locked Squeeze-Trigger Handle Butterfly - Cable-Locked Squeeze-Trigger Handle Butterfly Valve Lockout
MASTER LOCKCable-Locked Squeeze-Trigger Handle Butterfly Valve Lockout

MASTER LOCK S3921 Cable-Locked Squeeze-Trigger Handle Butterfly

The MASTER LOCK Butterfly Valve Lockout Kit (MPN S3921) is a red cable-locked squeeze-trigger handle butterfly valve lockout. It includes a Squeeze Handle Cable Lockout for securing equipment during maintenance.

SKU 3G-OTH-554976

Also listed as: S 3921 · S-3921

Brand
MASTER LOCK
Item
S3921 Cable-Locked Squeeze-Trigger Handle Butterfly
Category
Cable-Locked Squeeze-Trigger Handle Butterfly Valve Lockout
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Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Delivery
Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to
Singapore

Technical Specifications

MASTER LOCK
Manufacturer Part Number
S3921
Type
Red
Includes Cable Master Lock
Squeeze Handle Cable Lockout

Technical Documents

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MASTER LOCK Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The MASTER LOCK Butterfly Valve Lockout Kit (MPN S3921) is a red cable-locked squeeze-trigger handle butterfly valve lockout. It includes a Squeeze Handle Cable Lockout for securing equipment during maintenance.

Frequently Asked Questions

What is the MASTER LOCK Butterfly Valve Lockout Kit used for?

The MASTER LOCK S3921 kit secures butterfly valves in the closed position during maintenance. It uses a cable-locked squeeze-trigger handle to prevent accidental valve operation, supporting lockout/tagout safety procedures in industrial plants, refineries, and water treatment facilities.

What are the specifications of the MASTER LOCK S3921?

The MASTER LOCK S3921 is a red butterfly valve lockout kit. It includes a Squeeze Handle Cable Lockout. The manufacturer part number is S3921. It is designed for cable-locked squeeze-trigger handle butterfly valves, enabling secure equipment isolation during maintenance.

Where to buy the MASTER LOCK Butterfly Valve Lockout Kit worldwide?

3G Electric supplies the MASTER LOCK S3921 Butterfly Valve Lockout Kit worldwide. We handle full logistics, customs clearance, and delivery to your facility. Contact us for pricing and lead time on this cable-locked squeeze-trigger handle lockout kit.

How to install the MASTER LOCK Butterfly Valve Lockout Kit?

To install the MASTER LOCK S3921, close the butterfly valve fully, then wrap the cable around the valve handle and through the squeeze-trigger mechanism. Secure the cable with the included lockout device. Always follow your facility's lockout/tagout procedures and verify zero energy before maintenance.

Used in

Common applications for MASTER LOCK
Locker security in industrial facilities — Master Lock built-in deadbolt lock (MPN 1710) for employee lockers
Equipment access control on job sites — Master Lock Bluetooth padlock (MPN 4400ECWWG) for tool cribs and gates
Key management for fleet vehicles — Master Lock lockbox (MPN 5440ECWWG) securing vehicle keys at depots
Padlock for outdoor storage units — Master Lock long shackle combination padlock (MPN 175LH) for hasps on sheds
Keyless entry for maintenance panels — Master Lock scrolling combination padlock (MPN 975DCOM) on electrical enclosures
High-security locking for warehouse cages — Master Lock stainless steel combination padlock (MPN 1500LF) for corrosion resistance
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MASTER LOCK Products

3G Electric supplies MASTER LOCK cable-locked squeeze-trigger handle butterfly valve lockout. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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This cable-locked squeeze-trigger handle lockout device is designed for lever handle butterfly valves. It secures the valve in the closed position during maintenance to prevent accidental operation. The device is red and does not include a cable. Suitable for lockout/tagout procedures in industrial settings
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This cable-locked squeeze-trigger handle lockout device is designed for lever handle butterfly valves. It secures the valve in the closed position during maintenance to prevent accidental operation. The device is red and does not include a cable. Suitable for lockout/tagout procedures in industrial settings