Model E25S – Actuated – Steam/Water Mixers – Emech™ Digital Control Valves

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 stand-alone 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

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