427 SERIES CHECK VALVE
Maximum Operating Pressure — 125 psi
Maximum Operating Temperature — 140°F
Seat Area Open Diameter — .250
Design Considerations
The 427 Series Check Valve design promotes multiple configurations to fit the exact end use application. The 427 Series Check incorporates a plastic poppet that seals on a quad ring. The 427 Check poppet option works best in applications that see consistent working pressure at the high end of the Maximum Operating Pressure range. Gray PVC with 1 psi stainless spring is the standard configuration. Nylon, PVDF (KynarŪ) and Glass Filled Polypropylene are available for chemical resistance applications. MakroBlend is an NSF Standard 51 Approved Material. Hastelloy is a superior chemically resistant spring material.
Options
| Material Options | Gray PVC (Standard), White PVC, Black Polypropylene, White Polypropylene, Black Nylon, White Nylon, MakroBlend, Black PVDF (Kynar®) |
| Seal Options | Buna-N, Ethylene Propylene, Fluoroelastomer (Viton®) |
| End Options | 1/8, 1/4 Male and Female NPT 1/8, 1/4, 5/16, 3/8, 1/2 Hose Barb 1/8, 1/4 JACO 1/4, 3/8 SMC Push-To-Connect 3/8 BIB (Smooth Barb) |
| Cracking Pressure | 302 Stainless Spring - 1/3 psi, 1 psi (Standard), 1.5, 3, 5, 7, 10, 12 psi or No Spring, Hastelloy Spring - 1/3, 1, 5, 12 psi |
Example of how to order
| Body Material PVC |
Inlet End 1/4 MNPT |
Outlet End 1/4 FNPT |
Seal Buna-N |
Spring 3 psi |
SMC Part Number: PVC 427-4M4F-B,3#
The flow arrow on the body will point from Inlet to Outlet. SMC Part Numbers are a description of the valve as read left to right, Inlet to Outlet.
Example: PVC 427-4M4F-B,3# = 1/4 MNPT Inlet x 1/4 FNPT Outlet