4″ Aluminum Flat Seat Emergency Valve – Manual – Straight

Betts flat seat style emergency valves combine Betts quality with an economical design. Valves feature aluminum construction with a specially designed seat disc to provide positive sealing. Shear section tested per TTMA RP84 and meets 49CFR178.345-8.

Cable operated valves are supplied with a universal lever arm which provides up to 8 cable travel options to work with most operators. Lever arm is “E” Coated to provide exceptional corrosion resistance.

Parts List

Product Details

Assembly NumberOutletWt.
EV46423AL*4" Grooved8.9
EV46543AL*4" Flanged8.9
*Replace asterisk in part number to designate seal material.
Example Assembly
(4″ Aluminum Flat Seat Emergency Valve - Manual - Straight)

Specify Viton seals by substituting "V" for "B" in Assembly Number

Force rating from TTMA RP86: 4" Valves Fb-max=10,000 lb.

CAUTION: Never bottom load through emergency valves without first opening valve. Failure to do so may result in damage to the tank and/or valve.

Assembly NumberDims. AInlet Flange B.C.Inlet Flange HolesOutlet Flange B.C.Outlet Flange Holes
EV46423AL*A: 6.38"7.25"8-9/16N.A.N.A.
EV46543AL*A: 6.38"7.25"8-9/168-7/168-7/16

Additional Options

Left-hand valves are available with air cylinder or cable lever arm on opposite side of valve as shown at right. Add suffix –005 for left-hand option. Add suffix –004 for optional screen.

4″ Valves are available with Stainless Trim, add suffix 010.

Engineering Bulletins

EB-01-12: Water Flow Rates of Betts Emergency Valves

EB3-00: MAWP and Bursting Pressure Ratings for Betts Valves

EB-02-03: Cable Emergency Valve System Schematic