1/4 in. Brass Ball Valve with Locking Handle | 940171L
1/4 in. Brass Ball Valve with Locking Handle | 940171L
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The 1/4 in. forged brass full-port ball valve (part 940171L) pairs 600 psi WOG shutoff with a padlockable locking handle — lock it open or closed for lockout/tagout and tamper-resistant service. Female NPT both ends per ANSI B1.20.1, hard chrome-plated solid ball, virgin PTFE seats, bottom-loaded blow-out-proof stem. The manufacturer designates this line UL 842 / UL 258 / UL 125 and FM (5 psig gas) in its catalog; Apex has not independently verified the listing file. Each valve individually tested per the manufacturer.
Technical Specifications
| Manufacturer Part Number (MPN) | 940171L |
| Nominal Size | 1/4 in. |
| Valve Type | Full-port ball valve, forged brass, locking handle |
| End Connections | Female NPT × Female NPT, ANSI B1.20.1 |
| Pressure Rating | 600 psi WOG non-shock |
| Steam Rating | 150 psi WSP saturated steam |
| Temperature Range | −22°F to 302°F (−30°C to 150°C) |
| Listings | UL 842, UL 258, UL 125, FM (5 psig gas) — manufacturer designation; listing file not independently verified by Apex |
| Port | Full port (full bore) |
| Operation | Quarter-turn locking lever — padlockable open or closed |
Dimensions
| Bore Diameter | 0.31" |
| End-to-End Length | 1.73" |
| Height (center to top) | 1.84" |
| Handle Length | 3.15" |
| Weight | 0.39 lb |
Materials of Construction
| Body & End Connection | Forged Brass |
| Ball | Brass, hard chromium plated |
| Stem | Brass, bottom-loaded, blow-out-proof, adjustable packing gland |
| Ball Seats & Stem Seal | Virgin PTFE |
| Gland | Brass |
| Handle | Steel, locking type |
Performance & Testing
- Locking handle accepts a padlock in the fully open or fully closed position — supports OSHA lockout/tagout (LOTO) procedures
- Full-port bore — minimal pressure drop
- Each valve individually pressure tested
- Confirm media and service compatibility with the manufacturer before specifying
- Blow-out-proof stem with adjustable packing gland — field-serviceable seal
- Not lead-free — for potable water supply lines, choose a lead-free certified valve (see Lead-Free Valves in our Valves menu)
Other Sizes in This Series
Forged Brass Full Port Ball Valve with Locking Handle, 600 WOG, Female NPT (1/4"–2"). Jump to another size:
| Size | Part # |
| 1/4 in. (this page) | 940171L |
| 3/8 in. | 940172L |
| 1/2 in. | 940173L |
| 3/4 in. | 940174L |
| 1 in. | 940175L |
| 1-1/4 in. | 940176L |
| 1-1/2 in. | 940177L |
| 2 in. | 940178L |
Typical Applications
Lockout/tagout points on equipment and process lines, fuel and gas piping (manufacturer-designated UL 842 / UL 258 / UL 125; FM 5 psig gas), fuel transfer (gasoline/diesel), compressed air isolation, tamper-resistant outdoor or public-access installations, and general industrial shutoff where the valve position must be secured. Not for potable water supply (not lead-free).
Cross-References & Interchange
Replacing another brand's 1/4 in. 600 WOG locking brass ball valve? Match nominal size, end connections, and WOG rating for a direct fit — or send us your part number and we will confirm the interchange. Need a male thread on one end? See the 1/4 in. MxF locking-handle ball valve (948170L). Don't need the locking handle? The standard 1/4 in. 600 WOG full-port ball valve (940171) is the same valve with a conventional lever.