Tyler Anderson recently won a project for a mobile OEM to replace Norgren valves with a custom MAC Valve solution. The OEM used a Norgren solenoid valve on the front undercarriage of their trucks to initiate the trucks air horn, as well as other auxiliary devices controlling features like seat height.
In that application, the valves are exposed to the environment, including water and temperature fluctuations. The Norgren valves were failing often due to water ingression and seal issues. Each time a valve failed, the OEM would need to send a service technician to replace the valve, which was very costly. While onsite for a different project, talks began about the valve issue and how MAC and Adams could solve the problem by adding modifications to a MAC Valve to accommodate for the water contact and temperature fluctuations. The OEM was interested but needed the valve to be field replaceable as well, so a custom drop-in ready base was created to mount directly to the existing valve bracket. This allowed the customer to use one part number for both new trucks and field upgrades.
For the finalized assembly, MAC and Adams provided a valve with wash-down resistance, Viton seals for the wide temperature range requirement, MOV suppression, Loctite SS screws, a manual operator for testing, and wide pressure range functionality (40-150psi). The Norgren valve had fittings plumbed to and from the valve to get the desired functionality, so the MAC base was designed to have two inlets and one outlet, allowing the elimination of six of said fittings.
The added value provided allowed the customer to justify paying approximately 3x for the MAC Valve with the modifications needed for the applications, compared to the original Norgren. EAU for this valve assembly is ~500 units per year.