Tamper Proof / Air Valve
Developed to prevent unauthorized operation or tampering of valves in public networks, these valves feature mechanical lockouts, padlock compatibility, or key-operated mechanisms to ensure operations are limited to authorized personnel.
Introduction
GM Dalui tamper-proof valves are specially designed valves that prevent unauthorized operation or manipulation. These valves are equipped with secure locking mechanisms and tamper-resistant features, making them ideal for applications in public utilities, industrial plants, and safety-critical systems where controlled access is essential.
Key Features
- Key-operated cap or padlock-locking bracket design.
- Robust body design resistant to external impact and vandal attempts.
- Resilient seated gate mechanism ensures bubble-tight sealing.
- Clear lock/unlock mechanical status indicator.
- Ideal for fire mains and public water schemes.
Technical Specifications
| Design Feature | Standard Parameters / Range Options |
|---|---|
| Nominal Size Range | Up to 300 mm |
| Manufacturing Standards | AWWA C512, Manufacturer Standard |
| Material of Construction (MOC) |
|
| Pressure Ratings | 1.0 / 1.6 / 2.0 / 2.5 / Class 150# / 300# / 800# |
| Modes of Operation | Lockable Handwheel, Gear operated with Lock, Padlock attachment |
| End Connections | Flanged |
| Application Media | Fire protection lines, public distribution standposts, high security pipelines. |
Application & Usage of Tamper Proof / Air Valve
Public Water Networks
Vandal-resistant locks prevent unauthorized water theft, tampering, or manipulation in municipal distribution posts.
Fire Hydrant Mains
Secures fire protection standpipes and control valves from accidental or unauthorized shut-off.
Secure Industrial Pipelines
Restricts flow control access to designated technicians using specialized key lockouts.
Types of Tamper Proof Valves
Tamper Proof Security Valve
Prevents unauthorized access with unique keycaps or locks, ensuring system integrity and safety. Size: 50-600 mm.
Lockable Sluice Valve
Includes a lockable handwheel or gearbox padlocking shroud to restrict control in municipal water grid junctions.
Tamper Proof Kinetic Air Valve
Provides high-speed air release and vacuum protection under a heavy security cowl that resists vandalism.
Certificates & Inspection
All valves are subjected to rigorous hydrostatic shell and seat pressure testing in accordance with standard codes (e.g., API 598 / IS 14846) prior to delivery.
- Physical dimension and wall-thickness checks
- Hydrostatic seat and shell test validation
- Manufacturer Test Certificate (MTC) and third-party inspection (SGS, TUV, RINA, IRS etc.) available
- Epoxy powder coating inspection (DFT test)
Quality Assurance
GM Dalui & Sons Pvt. Ltd. is an ISO 9001:2015 certified manufacturer. Our commitment to safety, reliable sealing, and long service life is backed by rigorous material inspection, ultrasonic wall thickness checks, and design calculations.
We customize flow control systems to meet specific requirements for municipal waterworks, agricultural pumping wells, chemical distribution loops, and thermal power plant grids.