Dual-Check® Pneumatic Check Valve

Dual-Check® Pneumatic Check Valve 2018-05-23T10:05:42+00:00

Product Overview

The Dual-Check® valve, designed specifically for pneumatics, is a patented Aladco® product.  It is the only parallel check valve that can be manually overridden with a single override button or with an internally plumbed air pilot.  The Dual-Check® is sealed and can be used in either sanitary or harsh/dirty environments.

A typical use of a Dual-Check® valve involves combining it with a direction control valve to control air flow from both ports of a double acting cylinder. With an appropriate combination of direction control valves and other pneumatic components, a cylinder position control system using a Dual-Check® can handle both normal position control and standby or safety stop conditions. A combined valve system can have excellent fail-safe and assured control properties.

Dual-Check Group

Features

  • Prevents load drift
  • Provides rapid stopping of load
  • Can provide multiple position control
  • Does not require lubricated air
  • Operating pressure 15-150 psi
  • Exceeds A.N.S.I. Class VI Leak Standard (bubble-tight) for 1/2″ port size
  • Patented and made in the USA
  • Standard 3-year warranty
Dual-Check Circuit Diagram 01
Dual-Check Circuit Diagram 02

Product Highlights

  • Dual-Check’s® rugged valve body and internal components are made of anodized 6061 aluminum.
  • Internal springs are made of high fatigue-resistant, nickel-coated 302 stainless steel. (MTTF is over 100 million cycles).
  • Standard seals are Buna-N (-30 to 150oF temperature range). Viton seals (-15 to 400oF temperature range) are also an available option.
  • Superior, self-cleaning ball seal provides long product life. (MTTF is over 100 million cycles).
  • The valves are tamper resistant and do not require maintenance. The valves do not require lubricated air, but can be used with lubricated air.

Application Information

A Dual-Check® valve can be used in the control systems for a wide variety of double acting cylinder applications. Applications can involve work holding, clamping and positioning, and moving parts or equipment components in a wide variety of manually operated and automated machinery.

Specific circuit design and switching valve selection is application-dependant. Your Aladco® distributor or Aladco® can be contacted to provide assistance with answering application questions.

Dual-Check® Pneumatic Check Valve Dimensions

DIMENSIONS & SPECIFICATIONS
Port Size A B C D E F G H J K L Cv Weight
10-32 2.50 1.00 0.75 0.25 0.14 2.00 0.85 0.81 0.38 1.74 0.18 0.2 0.25 lb
1/8″ 3.38 1.75 1.00 0.69 0.25 2.00 1.17 1.03 0.68 2.02 0.22 0.8 0.75 lb
1/4″ 4.75 2.50 1.50 0.69 0.31 3.38 1.62 1.51 0.97 2.81 0.28 1.7 1.5 lb
3/8″ 4.75 3.00 1.50 0.69 0.44 3.38 1.62 1.51 0.97 2.81 0.28 1.7 2.0 lb
1/2″ 4.75 3.00 1.50 0.69 0.44 3.38 1.62 1.51 0.97 2.81 0.28 1.7 2.0 lb
3/4″ 5.20 3.00 1.50 0.60 0.32 4.00 1.73 1.75 0.76 3.68 0.28 3.2 2.0 lb

*A-L All dimensions in inches
NPTF Ports conform to ASME B1.20.1-2013 Pipe Threads, General Purpose (Inch)
BSPP (G) and M5 Ports conform to ISO 16030:2003:  Pneumatic fluid power – Connections – Ports and stud ends

Disclaimer:
Technical details subject to change without notice

Model Ordering Information

Dual-Check 617501 and 605001
Model Examples:

Model 603801 is a Dual-Check® valve with 3/8” NPTF threaded Inlet/Outlet ports, Buna-N seals and an extended override button.

Model 603801BSPP is a Dual-Check® valve with 3/8” BSPP Inlet/Outlet ports, Buna-N seals and an extended override button.

Dual Check® Resource Download

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Solid Model Step Files

  Dual-Check® Valve Line