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.

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.


Air Blow Filter Capacity Test

Dimensional Data

 

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 1/22 1/162 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 1/22 1/163 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

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
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.

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