Electrical 21312 Fairchild Products Model 21 Adjustable Ratio Relay

• Certification: CE
• Temperature: Ordinary Temperature
• Connection: Welding
• Valve Seat: Single-Seat
• Structure: Lever
• Material: Stainless Steel
• Model NO.: 21312
• Product Category: Pneumatic Relays
• Connection Size: 1/4 in. NPT
• Flow Capacity: 40 Scfm (68 M³/Hr)
• Product Type: Adjustable Ratio Relays
• Transport Package: Carton
• Origin: Us
• HS Code: 8481100090
• Production Capacity: 9999pieces/Year

Product Description

21312 Fairchild Products Model 21 Adjustable Ratio Relay

• The Model 21 Adjustable Ratio pneumatic relay has a signal chamber lever arm, whereby the ratio of output pressure to signal pressure is infinitely adjustable. The adjustment range permits signal amplification of 1:30 or signal reduction of 30:1 by rotation of the ratio adjustment knob which moves the fulcrum. . Output pressure is a function of signal pressure times the ratio of lever arm lengths on either side of the fulcrum. Bias may be introduced by means of the set screws. The Model 21D is available with both input and output adjustable bias. Maximum input bias is 3 psig, with a maximum output bias of 9 psig. The basic mathematical expression for the bias in this relay is Po = (Ps-K1) R+K2, where Po = Output pressure, Ps = Input signal, R = Ratio of setting, K1= Input bias, (-) only, and K2 = Output bias, (+) only.
  
  Features
   
• Adjustable from 30:1 dividing ratio to 1:30 multiplying ratio
• Venturi aspiration system
• Optional input and output biasing
• Floating seal ring isolates control chamber
• Panel or Line Mounting

Benefits
  Assures infinite pressure adjustments Compensates for downstream pressure losses Allows versatility in applications Increased stability by reducing effect of high flows Easy installation and service in the field.

Shenzhen Aimiqu Technology Co., Ltd.

Shenzhen Aimiqu Technology Co., Ltd. was established in 2016 and is located in Bao'an District, Shenzhen. The company has professional technical personnel, focusing on the development and practice of automation, digitalization, networking and intelligence in the industrial field.

 

Provide products, solutions and services for the majority of industrial enterprises and governments with automation systems, digital factories, industrial Internet and industrial big data intelligent integration, and strive to become a domestic intelligent manufacturing overall solution provider.


Shenzhen Aimiqu is a factory specializing in production & sales & research in electric cabinet.

And Shenzhen Aimiqu is a specializing in sales original PLC&pneumatic products & Industrial Control Instrumentation including Siemens,Fairchild and ST etc and related accessories .

In PLC&Pump Valve & Pneumatic industry&Industrial Control Instrumentation has a strong popularity and good reputation,and provide professional customized services(Our main business is according to customer dr...

 

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1.Who we are
  We focus on the PLC, instrument and transmitters industry, mainly selling world-famous PLC,instrument and transmitters brands

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