Key Specifications/Special Features:

Series F203 butterfly valves designed to comply with
MSS SP-67, BS5155 and API 609
Compatible with ANSI, DIN, BS, JIS flanges
Seat of series F203 butterfly valve is designed without back
Tongue and groove seat is lower torque and field replaceable
There is O-ring cast on the seal surface of the seat, no need for flange gaskets
Available in size 1 to 24"
Available in wafer type, lug type body
Available with handles, manual gear operators and electric or pneumatic actuators

Materials
1. Body:
Cast iron: ASTM A126CL.B, DIN1691 GG25, EN 1561 EN-GJL-200, GB12226 HT200
Ductile cast iron: ASTM A536 65-45-12, DIN 1693 GGG40, EN1563 EN-GJS-400-15, GB12227 QT450-10

2. Upper Stem:
Zinc-plated steel
Stainless steel: ASTM A276 type 316, type 410, type 420 ASTM A582 type 416

3. Spring pin:
Stainless steel
Carbon steel

4. Disc:
 Ductile cast iron (nickel-plated or nylon coated): ASTM A536 65-45-12, DIN 1693 GGG40, EN1563 EN-GJS-400-15, GB12227 QT450-10
Stainless steel: ASTM A351 CF8, CF8M CF3, CF3M EN 1.4408, 1.4469 1.4501
AL-Bronze: ASTM B148 C95400

5. Lower stem:
Zinc-plated steel
Stainless steel: ASTM A276 type 316, type 410, type 420, ASTM A582 type 416

6. Seat
NBR, EPDM, Neoprene, Viton

7. O-ring
NBR, EPDM, neoprene, viton

8. Bushing
PTFE, nylon, lubricated bronze