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Metal Seated Trunnion Ball Valve

1. Product overview

Metal seated trunnion ball valve, 12" 900LB

A metal seated trunnion ball valve, forged steel 3 pieces body, side entry, gear operated, 12″ 900LB RF API 6D.

 

The metal seated trunnion ball valve has two prominent features: metal to metal seating and trunnion mounted ball design. These valves have been widespread in severe service applications where pipeline flow may contain solids and harsh corrosives, operating at elevated temperatures and high pressures. The trunnion mounted ball can be fixed by bearing pads in the body, by trunnions or by bearing stems. Both the ball and the metal seat ring will be precisely machined/ ground and enhanced by high velocity oxygen fuel(HVOF) coating process. Metal seated trunnion ball valves have many advantages such as excellent corrosion & wear resistance, tight shut-off, smooth control, low torque, wide temperature & pressure range, as well as stability under pressure.

2. Design features and material selection

Design standards: API 6D, API 608, BS 5351, ISO 14313, ASME B16.34; Size range: 2″~40″; Pressure ratings: 150LB~2500LB; End connection: ASME B16.5, ASME B16.25, ASME B16.11; Face to face: ASME B16.10; Inspection and test: API 598, API 6D, EN 12266-1. The metal seated trunnion ball valve is available in either full port(FB) or reduced port(RB), 3-piece or 2-piece split body and side entry, lever/gear or actuator operated. Serial No.: MTBV13. See the technical drawings and dimensions of MTBV13.

Design Features

forged steel metal seated trunnion ball valve

The design features of forged steel metal seated trunnion ball valve, 2 piece or 3 piece split body, side entry with ISO 5211 mounting pad.

(1) ISO 5211 mounting pad to facilitate the assembly of actuators.
(2) Pacing material: graphite.
(3) The sealing area of both seat ring and ball is HVOF coating with Tungsten Carbide-Cobalt(WC-Co).
(4) The seat is spring-energized to ensure low-pressure tightness.
(5) Diverse seating patterns including self-cleaning design.

Material Selection

3D explosive of metal seated trunnion mounted ball valve

The 3D explosive view of a typical metal seated trunnion ball valve, forged steel 3 piece split body, side entry.

ItemPart NameCarbon SteelStainless SteelLow Temperature
1BodyASTM A105NASTM A182 F316ASTM A350 LF2
2BonnetASTM A105NASTM A182 F316ASTM A350 LF2
3BallASTM A182 F316+WCASTM A812 F316+WCASTM A812 F316+WC
4TrunnionASTM A105N+CrC17-4PH+CrCASTM A350 LF2+CrC
5CoverASTM A105NASTM A182 F316ASTM A350 LF2
6StudASTM A193 B7ASTM A193 B8ASTM A320 L7M
7NutASTM A194 2HASTM A194 8ASTM A194 7M
8BearingASTM A182 F316L+N2ASTM A182 F316L+N2ASTM A182 F316L+N2
9GasketSS316 + GraphiteSS316 + GraphiteSS316 + Graphite
10GasketSS316 + GraphiteSS316 + GraphiteSS316 + Graphite
11Support LegsASTM A283 Gr.DASTM A283 Gr.DASTM A283 Gr.D
12StudASTM A193 B7ASTM A193 B8ASTM A320 L7M
13NutASTM A194 2HASTM A194 8ASTM A194 7M
14PlugASTM A182 F316LASTM A182 F316LASTM A182 F316L
14aGasketSS316 + GraphiteSS316 + GraphiteSS316 + Graphite
15Stem17-4PH17-4PH17-4PH
16BearingASTM A182 F316L+N2ASTM A182 F316L+N2ASTM A182 F316L+N2
17GasketSS316 + GraphiteSS316 + GraphiteSS316 + Graphite
18ScrewASTM A193 B7ASTM A193 B8ASTM A320 L7M
19PackingGraphiteGraphiteGraphite
20Lift LugsASTM A283 Gr.DASTM A283 Gr.DASTM A283 Gr.D
21GlandASTM A182 F316LASTM A182 F316LASTM A182 F316L
22Gland FlangeASTM A216 WCBASTM A351 CF8MASTM A352 LCB
23StudASTM A193 B7ASTM A193 B8ASTM A320 L7M
24NutASTM A194 2HASTM A194 8ASTM A194 7M
25Top FlangeASTM A105NASTM A182 F316ASTM A350 LF2
26BearingASTM A240 316+PTFEASTM A240 316+PTFEASTM A240 316+PTFE
27KeyAISI 1045ASTM A276 420ASTM A276 420
28Stem PinASTM A276 304ASTM A276 304ASTM A276 304
29ScrewAISI 1035SS304SS304
30Graphite RingSS316 + GraphiteSS316 + GraphiteSS316 + Graphite
31SpringInconel X-750Inconel X-750Inconel X-750
32Seat GlandASTM A182 F316ASTM A182 F316ASTM A182 F316
33PackingGraphiteGraphiteGraphite
34SeatASTM A182 F316+WCASTM A182 F316+WCASTM A182 F316+WC
35SleeveAISI 4140+CrC17-4PH+CrCAISI 4140+CrC
36Trust PlateASTM A182 F316L+N2ASTM A182 F316L+N2ASTM A182 F316L+N2
37Cover FlangeASTM A105NASTM A182 F316ASTM A350 LF2
38Armor PlateASTM A283 Gr.DASTM A283 Gr.DASTM A283 Gr.D
The material selection of forged steel metal seated trunnion ball valve, 2-pc or 3-pc split body and side entry design.Other materials are available upon request.

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Trunnion Mounted Ball Valve

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