Siemens GCA Series Spring Return Actuators; Quality Matched With Reliability.

Siemens, with 150 years of experience in the HVAC industry, continues to produce the devices you’ve come to depend on for reliability, performance and quality.

For projects that require spring return actuators, consideration should be given to the Siemens GCA Series.  Built for damper areas of approximately 36 sq. ft, these actuators are rugged, offering 142 in-lbs of torque, built-in conduit connections and lightweight metal housing for unsurpassed durability.  These are designed to handle over 60,000 full strokes and 1.5 million repositions at rated torque and temperature.

The Siemens GCA161.1U

There is a GCA series configuration designed to serve your needs.  For control signal, there are options for On/Off (2-position), Floating (3-position) or Modulating (0-10 VDC, or 4-20 mA).  Other options include power supply, adjustable start/span (with 2 auxiliary switches), feedback and electronic tandem control.

The GCA models boast several features including:

• Brushless DC motors to gain reliable control of speed, braking and torque.
• Fail-Safe spring return that is bi-directional
• Manual override
• Self-centering shaft coupling (patented)
• Span adjustment and offset models are available
• cUL and UL listed

A number of accessories are also available that include different mounting kits, crank arms, tandem mount brackets, shaft adapters, NEMA rated weather shields and heater kits.

Siemens produces their actuators with versatility in mind, covering a wide variety of HVAC applications including rooftop units (RTUs), vortex dampers, mixing boxes, zone isolation dampers, inlet vane dampers, return air dampers, and outside air dampers including the supply, exhaust and discharge variety. 

Find a Siemens solution to fulfill your project needs today by shopping at E-Controls.net.

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Product Spotlight: Johnson Controls V46 Series of pressure actuated modulating valves.

Produced for both refrigerant systems as well as saltwater applications, the V46 series from Johnson Controls features numerous benefits.  This series was designed to be “direct-acting” with quick open option on increased pressure, and “reverse-acting” to close on pressure increase.  These devices control water flow to a condenser by sensing the changes in pressure through a refrigerant cycle.

The valve design is pressure balanced so that the setpoint is separate from the water inlet pressure.  These include pressure resistant bellows where refrigerant pressure grows up to 28-bar.  Likewise, the V46 series is pressure-actuated for fast and direct variations in pressure. They offer a high flow capacity with their smaller dimensions, in both angled body types and straight line, available in 3/8”, ½” and ¾” for a high Kv value.

The V46 pressure actuated valve with angled body type

Other features include:

Reduced Hysteresis: The close fitting and sliding parts are within water passages.

Easily Disassembled/Replaced:  Valve is designed for easy repairs “in line”.

Durability: bodies and monel parts are made of special bronze, excellent for sea water applications.

Power Elements:  Some models include stainless steel bellows for applications with ammonia filled equipment.

Connection Styles Options:  A wide range of types to meet various requirements.

Nickel Plated Seats:  available on valve sizes of 3/8", ½" and ¾” openings, they offer resistance against corrosion, cavitation and erosion.

Control Action:  Direct or reverse action can be factory changed to suit your application.

JCI notes that all of the V46 series regulating valves were designed as operating devices only.  In several applications where valve failure might result in personal injury or loss of property, it is required to install a separate safety shut off valve. 

For all of your pressure actuated modulating valves or many other products produced by Johnson Controls Inc, visit E-Controls.net, today!  

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