Products 
Internal 
Fisher internal valves provide primary shutoff and excess flow function for bobtail and transport truck tanks and also used on large stationary storage tanks and in-line installations.
Types C471 and C477 Internal Valves
Fisher Types C471 and C477 internal valves are typically used on the inlets and outlets of bobtail and transport trucks and on large stationary storage tanks. They can also be installed in-line.
Types C483-24 and C484-24 Internal Valves
Fisher Types C483-24 and C484-24 are frequently used on bobtail and transport truck tank applications, but they may also be used on large stationary storage tanks and on in-line installations.
C407-10 Series Internal Valves
Fisher C407-10 Series threaded internal valves are an excellent valve for vapor return lines on bobtail trucks.
Type C404-32 Flanged Internal Valve
Fisher Type C404-32 flanged internal valve provides a sturdy and compact means of directly mounting a pump or piping connection.
C403 and C404 Series Internal Valves
Fisher C403 and C404 Series flanged valves provide a sturdy and compact means of directly mounting a pump or piping connection.
C891 Series Internal Valves
Fisher C891 Series Internal Valves are typically used on the inlets and outlets of transport trucks and on large stationary storage tanks.
C421 Series Internal Valves
Fisher C421 Series internal valves are used as primary shutoff valves, excess flow valves, and back check valves. Its versatile two outlet design allows flexibility of use in multiple orientations and locations.
C427 Series Internal Valves
Fisher C427 Series internal valves are most frequently used on bobtail and transport truck tanks, but they may also be used on large stationary storage tanks and on in-line installations.
Quick Links