Pneumatic Regulators, Relays and Transducers

Precise and dependable

Siemens’ field-proven pneumatic regulators, relays, and transducers fulfill a number of applications in process control and manufacturing, including valve control, calibration stands, pneumatic control circuits, valve split ranging, bubbler level and impulse line purging. Backed by decades of service, our extensive portfolio also includes booster relays, air filters, filter-regulators and other accessories.

Pneumatics Line Card

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Precison regulators - USA

Precision Regulators

Model 40, 41, 42 Precision Pressure Regulators

Precision Regulators

Precision pressure regulators control air pressures in applications where precise and dependable regulation is required, such as pneumatic instrument circuits, test stands, production checking fixtures, and industrial air gauges.

 

Multi-stage precision regulators maintain constant output over wide changes in flow and supply pressure

  • Epoxy powder coat paint delivers improved corrosion resistance

  • Patented Nullmatic pressure regulation system provides reliable maintenance-free operation

USA - Booster relays

61 Booster Relays

Series 61 Booster Relays

61 Booster Relays

The series 61 Booster Relays reproduce pneumatic signals in a 1:1 ratio for applications where input isolation or increased flow capacity are required.

  • 61H is a High-Capacity Booster Relay designed to improve the stroking speed of large diaphragm valves.

  • 61VH is a High-Capacity Booster Relay designed for use on control valve actuators that require very fast stroking speeds

  • Both 61H and 61VH feature a stabilizing bypass needle valve between the input and output, which eliminates the need for an externally piped bypass.

  • Epoxy powder coating provides excellent corrosion resistance 

USA - pneumatic relays

Pneumatic Relays

Model 62, 63, 66, 661 Pneumatic Relays

Pneumatic Relays

  • Series 62 Constant-Differential Relays serve as air-flow controllers maintaining a constant air purge for each setting of an integral needle valve.
  • Series 63 Constant-Differential Relays are used in conjunction with an external needle valve to provide constant volume flow rates of liquids or gases over a continuously adjustable range.
  • The Model 66 Amplifying and Reducing Relays are used to increase or decrease control-circuit pressure signals.
  • Series 661 Amplifying Relays are fixed-gain force-balance instruments, which incorporate bias adjustment that amplify pneumatic instrument signals.
USA - Current-to-Pneumatic Transducers

Current-to-Pneumatic Transducers

Model 77 and 771 I/P Transducers

Model 77 and 771 I/P Transducers

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USA - Pneumatic Valve Accessories

Air Filters and Accessories

Filter Regulators

Air Filters and Accessories

The Model 91-HF Filter-Regulator is designed to provide clean, accurate air pressure to instruments, valves, and other automatic control equipment.  

 

The Model 2306 instrument air filter is used to remove dirt, oil, water, and other impurities from an instrument-air supply. 

 

 

Regulators

Precision Regulators

Precision pressure regulators control air pressures in applications where precise and dependable regulation is required, such as pneumatic instrument circuits, test stands, production checking fixtures, and industrial air gauges.

Multi-stage precision regulators maintain constant output over wide changes in flow and supply pressure

  • Epoxy powder coat paint delivers improved corrosion resistance

  • Patented Nullmatic pressure regulation system provides reliable maintenance-free operation

Relays

Pneumatic Relays

Series 61 Booster Relays

 

The series 61 Booster Relays reproduce pneumatic signals in a 1:1 ratio for applications where input isolation or increased flow capacity are required.

  • 61H is a High-Capacity Booster Relay designed to improve the stroking speed of large diaphragm valves.

  • 61VH is a High-Capacity Booster Relay designed for use on control valve actuators that require very fast stroking speeds

  • Both 61H and 61VH feature a stabilizing bypass needle valve between the input and output, which eliminates the need for an externally piped bypass.

  • Epoxy powder coating provides excellent corrosion resistance

Input pressure acting upon the effective area of the upper diaphragm, produces a force that is opposed by the output pressure exerted upon the effective area of the lower diaphragm.  The opposing forces are in a direct 1:1 ratio.

I/P Transducers

Current-to-Pneumatic Transducers

Current-to-Pneumatic Transducers (I/P Transducers)

 

Model 77 Current-to-Pneumatic Transducer

The Model 77 Current-to-Pneumatic Transducer, designed specifically for measuring circuits, converts the output of an electronic measuring device to a pneumatic signal.Model 771 Current-to-Pneumatic Transducers

 

The Model 771 Current-to-Pneumatic Transducers designed as a cost-effective valve service transducer.  The Model 771 receives the output of an electronic signal, such as a PID control function, and drives a control valve via the transducer until the control function is satisfied.

Features and Benefits

  • High signal sensitivity for demanding applications

  • Simplified design ensures simplified operation

  • Rugged, NEMA construction, with insensitivity to shock, vibration, and supply pressure variations, accommodate operation in harsh industrial environments

  • Choice of output capacities provides application versatility

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Find downloads, support and services for Siemens Process Instrumentation.
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Service offers

To remain competitive, companies in industry must ensure – and ideally increase – the availability and productivity of machines and plants. As your partner, we offer a unique range of services and support based on our extensive technology and industry expertise.

Service catalog

As your partner, we offer a unique range of services and support based on our extensive technology and industry expertise. With our offerings, you can expect a high degree of reliability and a successful digital future for your company.

Well trained for excellent handling

Receive standardized or individual expertise directly from the manufacturer – with training centers in more than 60 countries.

Safety integrated

Safety is key in the process industries. A failure in instruments relevant for safety may have serious implications for humans, the process and the environment. Therefore, a wide range of our process instruments come with on-board safety features for maximum risk reduction.

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How can we help you?

Whether you need to measure pressure, temperature, flow, level or weight, Siemens has best-in-class instruments to suit the unique needs of your plant or application - along with a global network of technical support available 24 hours a day, 7 days a week. Our high-performance and cost-efficient range of industrial solutions also includes devices for valve positioning, process protection, recording, controlling, communication and more.

Customer Support: 1-800-333-7421

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