From booster relays to filter regulators Siemens valve accessories are designed to work with valve positioners.
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.
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.
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
The Integral Volume Booster was designed for use on pneumatic actuators that require high flow for fast stroking times. The unit reproduces pneumatic signals in a 1:1 ratio for applications requiring increased flow capacity, while maintaining small step accuracy and reducing piping requirements.
Integrally mounted to the SIPART PS2
Provides a Cv of 2.0 to operate large actuators and valves
Maintains low bleed rate of the SIPART PS2
Utilizes an internal bypass needle valve for small step changes
When a Double Acting SIPART PS2 is used with a Single Acting actuator, the following must be considered:
With loss of supply air the Double Acting SIPART PS2 will lock in the last position. This prevents the actuator spring from returning the valve to its fail-safe position. By using the "venting" gauge block and properly piping the positioner to the actuator the air on the side opposite the spring can be exhausted back through the air supply line.
Model 91-HF Filter-Regulator
The Model 91-HF Filter-Regulator is designed to provide clean, accurate air pressure to instruments, valves, and other automatic control equipment. The filter regulator has been proven to provide long lasting corrosion resistance in harsh industrial environments. The 91-HF Filter regulator is a quality unit that is ideal as an economical alternative for control of process applications. It is used extensively to supply air to pneumatic controllers, transmitters, transducers, valve positioners, air cylinders, and a wide range of pneumatic control systems.
Stable output and repeatability
Corrosion resistant construction
Low droop at high flow levels
Model 2306 Instrument Air Filter
The Model 2306 instrument air filter is used to remove dirt, oil, water, and other impurities from an instrument-air supply. The highly efficient instrument-air filter uses the principle of coalescence to trap fine particles in a drip well.
A simple petcock permits the filter to be blown down periodically.
Solid brass construction delivers exceptional durability
Natural wool filter medium provides unsurpassed coalescing action
Find your local sales representative for Siemens Process Instrumentation
Customer Care (USA): 1-800-365-8766
USA Service and Support Call Center: 1-800-333-7421