OILMAN - Cameron FL/FLS style gate valve

The FL or FLS gate valve is a full-bore through-conduit valve designed and manufactured in accordance with ISO 10423, API 6A, and NACE MR-01-75. It is available in standard double flange, threaded-end, and special block body configurations. The following are standard features of the FL and FLS gate valves:
1. Sealing at the gate-to-seat and the seat-to-body is metal-to-metal.
2. The simplified gate and seat assembly has a minimum number of parts. One-piece seats and slab gate ensure reliable sealing and sim-plify field service. The modified Acme gate-to-stem thread allows the gate to move back and forth, or float, to seal against the seat.
3. The gate and seat assembly seals in both directions, and the gate and seats can be reversed for increased life.
4. The stem shoulder can be back seated against the bonnet to isolate the stuffing box, which allows field-replacement of the stem packing while the valve is under pressure.
5. The non-rising stem prevents a cavity pressure increase or displace-ment of cavity lubricant.
6. All FL and FLS valves have a specially designed, metal-to-metal sealing grease fitting which contains a check valve. The stem, gate, and seat are lubricated through the grease fitting which is located on the downstream side of the stem backseat for safety. No sealant or lubri-cant ports extend directly into the valve cavity.
7. The seal between the valve body and bonnet is a pressure-energized, BX-style metal bonnet gasket on 10,000 and 15,000 psi WP valves. Valves for 3000 and 5000 psi WP use a flat compression-type metal gasket.
8. API 6A Materials Classes and Temperature Classes are available, and other special trims area available upon request. Reduced-hardness bonnet bolting can be supplied for most sizes and pressures without downrating the working pressure.
9. With minor modifications, FLS valves can meet or exceed API 6FA fire safety requirements.

10. Special non-elastomeric stem packing designs can extend the standard temperature rating of the FL or FLS Gate Valve up to 350o F (180oC), or down to       -75o F (-60oC). These temperature ratings may not be avail-able in all working pressures.
11. An optional add-on torque multiplier is available for larger FL and FLS valves to provide easier operation.
12. See the valve assembly bill-of materials for materials and descriptions of valve components.