Tri-Clover® 62-174/326 Air Blow Check Valve

Air blow check valves protect pipelines against corrosion by air-drying the line. Air-drying causes a protective oxide film to form, and this film is the key to placing a system in its most corrosion-resistant condition.

CSI offers the Tri-Clover® 62-174/326 air blow check valve from Alfa Laval. These valves are designed to evacuate lines of product or clean-in-place (CIP) solution, and they are also used for air agitation of product in tanks and other vessels to thoroughly mix and blend the product. The Tri-Clamp® connection makes this valve easy to disassemble and reassemble for cleaning, replacing filter media, or inspection.

Models

  • 62-174 (low volume)
  • 62-326 (high volume)

For applications requiring a final filtering of air prior to entering a tank or pipelines, this valve conforms to 3-A accepted practices.

Applications

Alfa Laval’s Tri-Clover® 62-174/326 air blow check valves are designed to perform two main functions:

  1. To evacuate lines of product or CIP solution
  2. For air agitation of product in tanks and other vessels to thoroughly mix and blend the product
Working Principle

Filtered air enters the adapter (A) and exerts pressure on the valve plug assembly (B), causing it to move forward and unseat. The filtered air passes through the valve and around the valve plug assembly (B), entering the pipeline or tank.

62-174_326-Working-Principle

When the air pressure entering the adapter (A) is shut off, the valve plug assembly is returned to its normally closed position by return spring, preventing any product or CIP solution back flow.

Standard Design

The air blow check valve can be used in any position: horizontal or vertical. The valve can be used for product agitation in tanks or other vessels by using a Tri-Clamp, gasket, and mounting ferrule. No other fittings are required.

To use the air blow check valve to evacuate the lines of product or CIP solution, it's recommended to clamp it on the end of the “Y” branch of a ball check valve, rather than install it in the line.

Features
  • Fail-safe operation – Simple air-to-open, spring-to-close operation prevents product or CIP solution back flow.
  • Easy assembly & disassembly – Tri-Clamp connections permit quick assembly and disassembly for replacing filter media, cleaning, or inspection.
  • Remotely controlled – The supply of air to valve remotely controls the valve.
  • Rugged construction – The standard material is 316 stainless steel. The spherical plug assembly is bonded EPDM rubber.
  • 3-A conformance – For applications requiring a final filtering of air prior to entering a tank or pipelines, the valve conforms to 3-A accepted practices.
Materials
Product Wetted Steel Parts316
Product Wetted PartsEPDM (standard), SFY
Other Steel Parts304
Other SealsBuna
Technical Data
Pressure RangeVaries based on style of clamp used. Contact CSI.
Temperature Range20 – 284°F
Min Air Pressure8 – 10 psi
Adapter Options

A variety of adapters are available for connecting to your air line.

62-174_326-Adapters
Air Blow Filter Capacity Test
62-174_326-Filter-Capacity
Dimensional Data
62-174_326-Dimensions

Model 62-174
Connection

(in)

A

(in)

B - Air Line Quick Coupler

(in)

B - Hose Barb Adapter

(in)

B - NPT Tapped Hole Adapter

(in)

1 1/21 15/162 1/232
22 1/22 1/232
2 1/23 1/202 1/232
33 9/162 1/232
44 11/162 1/232
4 1/25 1/82 1/232
Model 62-326
Connection

(in)

A

(in)

B - Air Line Quick Coupler

(in)

B - Hose Barb Adapter

(in)

B - NPT Tapped Hole Adapter

(in)

1 1/21 15/16---
22 1/23 11/163 9/162 11/16
2 1/23 1/203 11/163 9/162 11/16
33 9/163 11/163 9/162 11/16
44 11/163 11/163 9/162 11/16
4 1/25 1/83 11/163 9/162 11/16
Replacement Media
62-174_326-Replacement-media
Model 62-174R ReplacementsModel 62-326 Replacements
Filter Disc (fits all sizes)Order #FA-1-1/2-30C
Sold 50/pkg
.3 Micron filtration
Order #FA-2-30C
Sold 50/pkg
.3 Micron filtration
Stainless Steel Perforated Disc
and Buna Gasket
Order #FAD-1 1/2-01-U
Sold in single units
Order #FAD-2-01
Sold in single units

The air blow check valve must be used with a Filter Disc (not furnished with unit). These filter discs are available in packages of 50.

Spare Parts

Air Blow Check 62-174 Spare Parts
Part1.522.5344.5Diagram Key
Quick Coupler Adapter7632787632787632787632787632787632781a
Rubber Hose Adapter2133842133842133842133842133842133841b
NPT Male Adapter: C2103392103392103392103392103392103391c
NPT Male Adapter: C12142062142062142062142062142062142061c
NPT Male Adapter: C22116772116772116772116772116772116771c
NPT Male Adapter: C32119162119162119162119162119162119161c
Filter Disc2212492212492212492212492212492212492
Clamp2121952121952121952121952121952121953
Back Up Gasket, Buna2201912201912201912201912201912201914
Back Up Gasket, EPDM2202752202752202752202752202752202754
Back Up Gasket, SFY2202842202842202842202842202842202844
Washer7548637548637548637548637548637548635
Spring7507887507887507887507887507887507886
Stem Guide7500357500357500357500357500357500357
Plug Assembly, EPDM7783097783097783097783097783097783098
Plug Assembly, SFY7705187705187705187705187705187705188
Valve Body7705337705347720277727047727057729009

62-174 Parts List

Air Blow Check 62-326 Hi Volume Spare Parts
Part22.5344.5Diagram key
Quick Coupler Adapter7632807632807632807632807632801a
Rubber Hose Adapter2101782101782101782101782101781b
NPT Male Adapter: C2135992135992135992135992135991c
NPT Male Adapter: C12117392117392117392117392117391c
Filter Disc2212502212502212502212502212502
Clamp2121962121962121962121962121963
Back Up Gasket, Buna2214402204402204402204402204404
Back Up Gasket, EPDM963405246196340524619634052461963405246196340524614
Back Up Gasket, SFY2206942206942206942206942206944
Washer7727347727347727347727347727345
Spring7513187513187513187513187513186
Stem Guide7502077502077502077502077502077
Plug Assembly, EPDM7727377727377727377727377727378
Plug Assembly, SFY7727387727387727387727387727388
Valve Body7727257727277727297727317727339

62-326 Parts List

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