ELECTRIC ACTUATED, FAST ACTING, PROCESS FLUID, SHUT-OFF VALVES
*FM APPROVED *EXLOSION
PROOF *INHERENTLY FAIL-SAFE *LONG SEAL LIFE
2500 ELECTRICALLY ACTUATED VALVES
Series 2500 valves are 2-way, globe-type,
piston valves. 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 a mechanical advantage enabling more force in operating the valve. It
also allows stronger return spring action to ensure reliable, fail-safe return.
Isolated actuator: In the Rotary Shaft valve, the fluid is contained
in the lower valve body assembly, completely away from the electrical portion of the
valve. Therefore, there is no possibility of explosive gas or corrosive liquid leaking
into the electrical enclosure, as there is in any packless type solenoid valve.
High temperature capability: Because the magnetic plunger
and the solenoid are mounted outside and away from the valve body, up to 425�F fluid
temperature, including steam, can be safely handled without coil insulation breakdown
which is often associated with packless type solenoid valves.
Quick acting, two position: Speed of operation is less than one
second and is independent of line-media conditions.
Manual operation provision: In case of an emergency or for trial
operation, the valve may be operated by hand using the external lever.
Visual position indication: The external lever also serves as a
visual position indicator.
Corrosion resistant materials: All internal parts are made from 316
High pressure capability: The mechanical advantage provided by
the external lever of the rotary shaft type enables the valve to be fitted with a much
stronger closure spring than is possible with any direct-lift packless type solenoid
valve. This allows a much higher opening pressure and/or a greater factor of safety for
opening and closing the valve.
Much longer maintenance-free life: The slight arc (15-30�) of the
rotary shaft offers superior seal life expectancy compared to reciprocating-stem packing
Dependable shut-off: Pressure and flow (above the seat) tending
to close the valve achieves shut-off reliability not possible with ball, gate, or
butterfly type valves.
Zero pressure operation: Valve is not dependent on pressure or flow
to open or close fully.
No tiny orifices: These valves contain no diaphragms, needle-sized
orifices or piston rings typical of packless type solenoid valves which are prone to
Heavy walled valve bodies: All valves have heavy walled cast bodies
which meet the ANSI ratings of class 150 & 300 for steel.
A Doubled Seal System: Ensures an absolute minimum of fugative
emmissions. The primary seal is Teflon� with a spring-loaded, secondary seal.
All Leslie Control
valves are 100% factory tested and serialized. Leslie Controls' quality assurance program
is accredited and certified to ISO 9001.
VARCOfor all your valve needs.
Please feel free to contact us with any questions about our products.
Thank you for visiting!
VALVES & CONTROLS, CO.
P.O. Box 630277 Houston, TX 77263-0277