4″ Aluminum Flat Seat External Air Emergency Valve – 90 Degree Elbow

  • Air Operated
  • Groove or Flange Outlet
  • Buna Urethane or Viton Seals

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.

Air operated valves are provided with an external air cylinder to help prevent gasoline or other products from contaminating the air supply. The air cylinder is hard-coated aluminum with a polished stainless steel shaft. Cylinders have 1/8” NPT port for air connection and are supplied with a fusible plug installed.

Parts List

Product Details

Assembly NumberOutletWt.DimensionsInlet FlangeOutlet Flange
EV46435AL*4" Grooved12.7lbsA: 4.38"
B: 6.25"
B.C.: 7.25"
Holes: 8-9/16
B.C.: N.A.
Holes: N.A.
EV46428AL*4" Flanged12.7lbsA: 4.38"
B: 5.00"
B.C.: 7.25"
Holes: 8-9/16
B.C.: 5.88"
Holes: 8-7/16
*Replace asterisk in part number to designate seal material.
Example Assembly
(3” Flat Seal Aluminum – Cable – 90-degree elbow – Grooved Outlet)

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

Force rating from TTMA RP86: 4" Valves Fb-max=15,500 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.

Repair Kits and Accessories

Replacement Air Actuator (Cylinder)

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

EB1-03: Air Emergency Valve System