产品名称：61FE继动器

Features & Benefits
      Force-balance principle produces a proportional output for pneumatic circuit flexibility
      Built-in stability needle valve on the 61H minimizes piping needs
      Improved valve stroking speed for better process control
      Epoxy powder coating provides improved corrosion resis-tance
      Accurate 1:1 signal relay provides pneumatic circuit design flexibility

Description
      The Series 61 Booster Relays reproduce pneumatic signals in a 1:1 ratio for applications where input isolation or increased flow capacity are required. Various models are available to meet a wide range of requirements.

Valve Service

Model 61H High-Capacity Booster Relay
     The Model 61H High-Capacity Booster Relay was designed to improve the stroking speed of large diaphragm valves.
As such, it incorporates a stabilizing bypass needle valve between the input and output, eliminating the need for an externally piped bypass.

Model 61VH High-Capacity Booster Relay
      The Model 61VH High-Capacity Booster Relay was designed for use on control valve actuators that require very fast
stroking speeds. As such, it incorporates a stabilizing bypass needle valve between the input and output, eliminating the
need for an externally piped bypass.

Pneumatic Control
Model 61L Moderate Accuracy Booster Relay
     The Model 61L Moderate Accuracy Booster Relay combines moderate accuracy with a moderate capacity (approximately 4.5 scfm output at 9 psi). Like the Model 61H relay, this instrument is used primarily in straight forward valve-booster applications.

Model 61F High Accuracy Booster Relay
      The Model 61F High Accuracy Booster Relay via the sensitive preformed diaphragms in this relay provides greater
accuracy in 1:1 transmission. Its output capacity is about 1/4 that of the Model 61L. As such, it is suitable for use in
measuring circuits.

Model 61FE Booster Relay
       The Model 61FE Booster Relay is similar to the Model 61F;however, it also includes a 1/8" NPT connection for those
applications where a tapped exhaust is required.

Operation
        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.
As such, any increase in the input pressure will depress the diaphragm assembly and open the pilot valve to admit a
sufficient supply of air to the output. This re-balances the input pressure. A decrease in input pressure will cause the
diaphragm assembly to lift off the exhaust port, which reduces the output and re-balances the input.

Specifications