Emech™ Model E25S Steam/Water Mixer
Emech™ Model E25S Steam/Water Mixer
The shear action disc design of the E25S valve provides precise
controlled mixing of steam and water. Fitted with the electronic
actuator and an integrated temperature sensor, the system ensures
fast, accurate and stable temperature control. The single compact
assembly simplifies installation. The independence of this standalone unit provides a reliable solution for hot water supply for
industrial applications.
The calibrated temperature probe fits into a 1/8” NPSM port in
the outlet, and connects via a cable to the actuator. With this
temperature feedback signal, the actuator can provide temperature
control accuracy of ±1°F (±0.5°C) and up to 200°F (95°C) heated
water at the outlet.
The E25S can handle a variety of input temperatures and pressures
to give a temperature rise. With sudden changes of inlet pressure
and temperature to the valve, the controller aggressively minimizes
outlet temperature variations.
Valve Features
•
•
•
•
•
•
•
•
•
•
•
ISO 5211, 5210 actuator flange mounting
Nickel chrome and cobalt coated CF8M (316) stainless steel
discs
1” valve flow coefficient Cv(max): 8.0
Valve constructed of CF8M (316) stainless steel
End connection: 1” NPT inlets and 1-1/4” NPT outlet
Top entry allows inline access to internal valve parts
Maximum inlet steam temperature 482°F (250°C)
Rated pressure: 145 psi (10 bar)
Seat leakage is approximately 0.05% of the valves Cv(max)
Design verification to ASME B16.34
U.S. patent approved
2.8"
4.7"
6.3"
Electronic Actuator Features
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Analog (4-20mA) input and output control signals for interfacing
with SCADA control
Software configurable control settings
Very high resolution capability (0.03° rotational)
External RS232 connection (cable supplied)
Stand-alone closed loop temperature control, or remote analog
(4-20mA) control options
Power: regulated 24Vdc 3.5 Amp supply required
Fail-safe position feedback (non-contact absolute encoder)
Keypad: 4 membrane switches with “dual touch” safety
features
Display: 3.5 digit LCD display with back light
Push-button power switch
Extra analog input for interfacing ancillary devices (e.g., flow
switch, level switch)
90° stroke time as low as 1.5 seconds for fast control action
Gearbox: planetary, lifetime lubrication, low backlash
100% duty cycle rated actuator
Emech Model E25S Steam/Water Mixer
Shipping weight
48.5 lbs (incl packaging)
Shipping box size
12.6” x 23.6” x 12.4” (W x L x H)
17.9"
Wiring Access
1/8" NPSM Sensor Port
Contact factory for other orientation
options for the actuator on the valve
Port A
1" NPT Water Input
Port C
1-1/4" NPT Outlet
Port B
1" NPT Steam Input
Safety
Consideration should be given during the design phase to the following conditions of the
proposed circuit/system:
•
Sudden loss of water pressure
•
Loss of power supply
•
Over-temperature safety—fail-safe system
If cold water supply or temp. sensor fails, the valve will be closed within approximately 2
seconds.
If there is a loss of power, the unit will remain in its last powered up position and can be
manually actuated using the manual override handle.
IMPORTANT NOTES:
1.
A minimum flow rate must be established for effective mixing and temperature
control. The approximate minimum flow for effective steam and water mixing for the
E25S valve is 4 U.S. gpm.
2.
Check (nonreturn) valves MUST be fitted to both inlets. Strainers are also
recommended.
3.
Sensible pipeline velocities must be considered in application design.
4.
Further information on installation requirements and recommendations is available
in the “Installation, Operation and Maintenance” Manual (IOM), a copy of which is
provided with the product.
5.
Armstrong’s Engineering Team is available to assist you with application support,
component selection and E25S valve sizing.
Designs, materials, weights and performance ratings are approximate and subject to change without notice. Visit www.armstronginternational.com for up-to-date information.
Armstrong Hot Water Group, 221 Armstrong Blvd., Three Rivers, MI 49093 – USA Phone: 269-279-3602, Fax: 269-279-3130
armstronginternational.com
Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Download PDF

advertisement