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3G Electric
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
Part Number
S3921
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
Payment
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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
Industrial lockout/tagout — Master Lock 1483BP410ES lockout station with padlocks and safety tags for hazardous energy control.
Commercial office buildings — Master Lock office lever locksets in satin brass or nickel for interior doors in administrative areas.
School and gym lockers — Master Lock 1670 built-in combination locker locks for right-hand mounting on metal lockers.
Equipment and gate security — Master Lock 8154DPF cable lock with 6 ft steel cable for securing equipment and gates.
Toolbox and storage security — Master Lock 176 combination padlock with brass body and steel shackle for lockers and toolboxes.
ADA-compliant locker applications — Master Lock 1676MKADA locker lock for accessible facilities requiring ADA compliance.
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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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