Midland Industries 46621 Spring Core Tank Valve 300 Psi

Product Description

The MIDLAND INDUSTRIES 46621 is a spring core tank valve designed for pneumatic system applications where controlled venting and pressure relief are required. Built with a brass body, this compact valve uses a 1/8-27 MNPT thread connection and is rated for working pressures up to 300 psi. The cracking pressure is set at 80 psi, and the 7/16 inch hex size allows for straightforward installation with standard hand tools. At 0.030 pounds, the 46621 is a lightweight, single-point fitting suited for tank and vent service in compressed air and pneumatic assemblies.

This valve is used in pneumatic tank applications where a spring-loaded core provides automatic venting or pressure response. The 1/8 in nominal MNPT connection is a standard thread size found on air tanks, pneumatic reservoirs, and related fittings throughout light industrial and trade environments. The overall length of 1.207 inches keeps the installed footprint minimal, making it suitable for tight mounting locations on tank ports or manifolds. Installation is typically performed by HVAC technicians, pipefitters, or pneumatic system technicians as part of tank assembly or service work.

Key Features

• Brass body construction for corrosion resistance and durability in pneumatic service
• 300 psi maximum working pressure rating
• 80 psi cracking pressure for spring-loaded core actuation
• 1/8-27 MNPT thread connection for standard tank port fitment
• 7/16 inch hex size for installation with common hand tools
• Compact overall length of 1.207 inches for tight-clearance applications

Compatibility

Designed as an OEM-style replacement or service fitting for pneumatic tank and vent valve applications using 1/8 in NPT threaded ports.

Installation Notes

Installation should be performed by a qualified technician familiar with pneumatic system service. Depressurize and isolate the tank or system completely before removing or installing any valve. Apply thread sealant appropriate for pneumatic service to the MNPT threads and tighten to the hex fitting using a wrench sized for 7/16 inch. Follow applicable local codes and manufacturer guidelines for pneumatic component service.