Bolting
The body-cover bolting conforms with ANSI B.1.1The nuts are manufactured conform with ANSI B18.2.2
Cover
The cover material is identical to the body.
Depending on the valve size and pressure class, either a casting or a forging is used.
Depending on the valve size and pressure class, either a casting or a forging is used.
Hinge Pin
The hinge pin is inserted into the valve and held in position by plug.
The larger size valves are provided with bolted flanges instead of plugs.
The larger size valves are provided with bolted flanges instead of plugs.
Arm
The arm material is identical to the body.
Hinge bushing is provided in the larger valve sizes to minimize friction and eliminate seizing.
Hinge bushing is provided in the larger valve sizes to minimize friction and eliminate seizing.
Seat Ring
The bottom seated type seat ring is screwed into the body.
The seating surface is finished by lapping.
The forged seat ring is heat-treated to deliver the best mechanical properties and required hardness.
The seating surface is finished by lapping.
The forged seat ring is heat-treated to deliver the best mechanical properties and required hardness.
Disc
The disc has a sufficient seating surface area which is ground and lapped to a mirror finish.
It is of one-piece construction and is heat treated to deliver the required mechanical properties and hardness.
It is of one-piece construction and is heat treated to deliver the required mechanical properties and hardness.
Body
The cast steel body is designed with a wall thickness which is greater at any point than the minimum requirement provided by API Std.600 or API 6D. Port and seat passage dimensions conform to ANSI B16.5 Pipe Fitting. The welded-in type seat ring is standard to allow interchangeability.
The standard body-bonnet joint is male-fernale, and the flange is round for all valves.
The standard body-bonnet joint is male-fernale, and the flange is round for all valves.
Applicable Standards
Steel Check Valves, API 6D, JIS
Steel Check Valves, ISO 14313
Steel Valves, ASME B16.34
Face To Face, ASME B16.10, JIS
End Flanges, ASME B16.5, JIS
Buttwelding Ends, ASME B16.25
Inspection And Test, API 598/ API 6D
Steel Check Valves, ISO 14313
Steel Valves, ASME B16.34
Face To Face, ASME B16.10, JIS
End Flanges, ASME B16.5, JIS
Buttwelding Ends, ASME B16.25
Inspection And Test, API 598/ API 6D
Design Description
BB. Bolted Bonnet
Swing Type, Anti-rotation Disc
Renewable Seat Rings
Non-penetrate Disc Shaft
Horizontal Or Vertical Service
Flanged Or Buttwelding Ends
Part Name
Swing Type, Anti-rotation Disc
Renewable Seat Rings
Non-penetrate Disc Shaft
Horizontal Or Vertical Service
Flanged Or Buttwelding Ends
Standard Material Specifiactions
ASTM Material | |||||||||
Carbon steel | 1.25Cr-0.5Mo | 2.25Cr-1Mo | 304 Type | 316 Type | 304L Type | 316L Type | 20 Alloy | ||
1 | Body | A216 WCB | A217 WC6 | A217 WC9 | A351 CF8 | A351 CF8M | A351 CF3 | A351 CF3M | A351 CN7M |
2 | Bonnet | A216 WCB | A217 WC6 | A217 WC9 | A351 CF8 | A351 CF8M | A351 CF3 | A351 CF3M | A351 CN7M |
3 | Disc | WCB+13Cr *1 | A217 WC6+HF | A217 WC9+HF | A351 CF8 | A351 CF8M | A351 CF3 | A351 CF3M | A351 CN7M |
4 | Hinge | A216 WCB | A217 WC6 | A217 WC9 | A351 CF8 | A351 CF8M | A351 CF3 | A351 CF3M | A351 CN7M |
5 | Arm | A216 WCB | A217 WC6 | A217 WC9 | A351 CF8 | A351 CF8M | A351 CF3 | A351 CF3M | A351 CN7M |
6 | Sear Ring | A105+13Cr *1 | A182 F11+HF | A182 F22+HF | NA | ||||
7 | Hinge Pin | A276 410 | A276 410 | A276 410 | A276 304 | A276 316 | A276 304L | A276 316L | 20-Alloy |
8 | Disc Washer | Carbon steel | A276 410 | A276 410 | A276 304 | A276 316 | A276 304L | A276 316L | 20-Alloy |
9 | Disc Nut | Carbon steel | A276 410 | A276 410 | A276 304 | A276 316 | A276 304L | A276 316L | 20-Alloy |
10 | Disc Nut Pin | 304 SS | 304 SS | 304 SS | 304 SS | 316 SS | 304L SS | 316L SS | 20-Alloy |
11A | Bonnet Gasket | 304+graphite | 304+graphite | 304+graphite | 304+graphite | 316+graphite | 304+graphite | 316L+graphite | 316+graphite |
11B | Ring Gasket | Soft steel | A182 F304 | A182 F304 | A182 F304 | A182 F316 | A182 F304L | A182 F316L | 20-Alloy |
12 | Bonnet Bolt | A193 B7 | A193 B7 | A193 B16 | A193 B8 | A193 B8 | A193 B8 | A193 B8 | A193 B8 |
13 | Bonnet Nut | A194 2H | A194 7 | A194 7 | A194 8 | A194 8 | A194 8 | A194 8 | A194 8 |
14 | Eyebolt | Carbon steel | Carbon steel | Carbon steel | Carbon steel+Zn | Carbon steel+Zn | |||
*1 | PN≥600 CLASS seal face will be HF | ||||||||
*2 | PTFE Optional | ||||||||
NA | Integral with vessell |