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On/Off Solenoid Valves
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On/Off Solenoid Valves

2500 Series Electrically Actuated Valves
2800 Series Heat Actuated, Fire Safety Shut-Off Valves

  • 1/2 - 4" Valve Sizes
  • ANSI CL 150 – 300
  • Body Material: WCB, CF8M
  • Cv Range: 3 – 160
  • End Connections: RF (Flanged), THD (Screwed End)

 

Leslie 2500 Series valves are 2-way globe-type, piston valves. Direct, semi-direct and pilot operated valve piston options make these valves ideal for use with viscous, dirty or clean fluids as well as light liquids and gases.RG 2500.gif (8780 bytes)

They are operated by an external lever connecting the lifting action of the linear actuator to the valve piston/plug, through a rotary shaft. The rotary shaft principle creates mechanical advantage enabling more force in operating the valve. It also allows stronger return spring action to ensure reliable fail-safe return.

FM Approved
The 2500 series is FM approved for safety shut-off on fuel oil and gases. The electric actuator is FM approved explosion proof (Class I, Groups B, C &D, Division 1. Class II, Groups E, F & G) and complies with requirements for NEMA 4 watertight enclosures.

Fully Automatic or Electrically Tripped
In the fully automatic configuration the actuator has a "NORMAL" fail to (or shelf) position. When the valve is de-energised (on any loss of signal), it will "fail" to this position. Upon re-application of the current the actuator will automatically energise and change the valve position.

In the manual reset, electrically tripped configuration the valve must be manually "latched" to leave the "NORMAL" position. Upon re-applying current to the actuator, it will trip the valve to revert to its "NORMAL" fail-safe position. Momentary energisation is all that is necessary to change valve position, however, the actuator is rated for continuous duty operation.

Both types are quick acting two position designs. Speed of operation is less than one second, independent of line media.

Rugged and Dependable
Because the actuator assembly is isolated from the valve body, fluid temperatures to 425°F/ 218°C (including steam) can be handled without coil insulation breakdown often associated with packless solenoid valves.

The slight arc of the rotary shaft offers superior seal life expectancy compared to reciprocating stem-packing glands. The Leslie 2500 Series has what it takes for quick shut-off of steam or process fluids and gases.RG 2800.gif (7536 bytes)

2800 Series for Fire Safety
The Leslie 2800 Series utilises the same design features as the 2500 Series, but is heat actuated for fire safety. These valves meet the requirements of AP1601 and conform to or exceed the requirements of OSHA paragraph 1910, 1016 (b) (4) (iv) (c).

The 2800 Series is designed to fail closed when ambient temperature reaches the rating of the fusible link holding the valve open. Fusible links are available in 135, 165, 212, 286 and 386°F ratings.

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Last modified: September 18, 1998