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.
Product Details
| Assembly Number | Outlet | Wt. | Dimensions | Inlet Flange | Outlet Flange |
|---|---|---|---|---|---|
| EV46435AL* | 4" Grooved | 12.7lbs | A: 4.38" B: 6.25" | B.C.: 7.25" Holes: 8-9/16 | B.C.: N.A. Holes: N.A. |
| EV46428AL* | 4" Flanged | 12.7lbs | A: 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 EV46435ALB (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 F=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. |
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Repair Kits and Accessories
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.