Home Call Call

Just to let you know we’re still open for business as normal but working remotely with reduced warehouse staff.
However please note there may be a delay on some deliveries due to supply chain issues during the COVID-19 Coronavirus crisis.

Just to let you know we’re still open for Business as normal but working remotely with reduced warehouse staff.
However please note there may be a delay on some deliveries due to supply chain issues during the COVID-19 Coronavirus crisis.

FAIRCHILD MODEL 21 - ADJUSTABLE RATIO RELAY

Model Number: 21

The Model 21 Adjustable Ratio Relay, employing a movable fulcrum design, allows infinite signal multiplication/division over the range of 1:30 to 30:1 by turning a simple adjustment knob. Preset input and output biasing are also possible with this high-quality unit.

  • Flow capacity 40 SCFM @ 100 psi supply, 20 psi set point
  • Sensitivity 0.5" Water Column
  • Supply pressure 250 psi maximum, Outlet pressure 150 psi maximum
  • Ratio range 30:1 through 1:30
  • Operating pressure (minimum) 0.5 psi
  • Pipe size 1/4" NPT - 3/8" NPT/BSPT

Items held in stock are available for next day delivery if ordered by 2pm. Items not in stock will state expected delivery time for each individual part number.

Any products not availale for online purchase are generally on a 2-3 week delivery, please call our sales office on +44 (0) 800 328 8511 for price and delivery.

If you wish to return a product for repair, exchange or upgrade please call our sales office on +44 (0) 800 328 8511 to obtain a Returns Note Authorisation (RN) form and a member of staff will instruct you further.

Any products returned without an RN will not be processed.

Can't find the right part? We have 1000's more products in stock
Part Number
Part Number / Description
Price Ex. VAT
Total Inc. VAT
Quantity
21312 Adjustable ratio 1/4" npt pneumatic relay.
£1,242.14 (ex. vat)
£1,490.57 (inc. vat)
£1,242.14 (ex. vat)
£1,490.57 (inc. vat)
-+
Dispatched Within: 2-3 Days
Please select a Quantity
Add to Cart
Can't find the right part? We have 1000's more products in stock
Call now: +44 (0) 151 343 9966