Triple Offset

Size: 2” to 48” (Larger size available on request)

Operating Temperature: 550° C (Above 550° C available on request)

Pressure Rating: As per 150# B16.34

Design Standard

The “Triple Offset” butterfly valve is available in a variety of both ANSI and PN classes, sizes and configurations.

Triple Offset Butterfly Valves are suitable for both throttling and positive isolation applications. These valves can control bidirectional flow, have zero leakage, low fugitive emissions, and work in steam-based applications up to 1022° F (550° C).

The triple offset sealing system allows the disc to move smoothly and frictionless along the specially designed body seat & disc seal. When the disc is closed, the seal ring (on the disc) energizes the seat (on the body), providing a snug-tight, high-performance fit. The laminated seal is constructed with grafoil layers sandwiched between metal laminations. This resiliency of the seal flexes and energizes according to the compressive forces generated and allows for minor body deformations due to temperature fluctuations without the risk of jamming. This provides a uniform “snap-in” effect and ensures bubble-tight shut-off.

Specifications

Size Range:

2” to 48” (Larger size available on request)

Temperature:

550° C (Above 550° C available on request)

Face to Face:

API 609 Category "B"

Body Material:

WCB/CF8/CF8M

Stem Material:

304/316/410 /17-4PH SS

Disc Material:

CF8/CF8M

Seat:

Viton/PTFE/EPDM/304+Graphoil

End Connection:

Wafer (3" to 24")
Lug type (3" to 24")
Flanged (3" to 24")

Operating:

Hand lever, Worm Gear Box

Design and Manufacturing:

API 609 / BS EN 593/AWWA C504

Inspection and Testing:

API 598/ BS EN 12266/AWWA C504/ISO 5208

Flange Standard Conformity:

ANSI B16.5/150, 300 class/BS 4504/AWWA C207

Top Mounting Standard:

ISO 5211

Leakage Class:

ASME B16, 16.104 Leakage Class VI

Design Features

Metal to metal sealing
Triple offset for quarter-turn design
Torque seated
More torque = More tightness
Bi-directional tight shutoff
Zero leakage compared to API 598
Speed of Operation: Variable closing speed as required
Non-rubbing rotation seating
No jamming
No cavities
Space & Weight saving compared to gate valves and ball valves
Inherently fire safe and fire tested
Less maintenance
Control capability

Applications

Process fluids
Hydrocarbons
Steam/Geothermal steam
Hot gas/Sour gas (NACE)
Blow down
Sulfur recovery
Acid, Caustic, Chloride
Abrasive service

Chart or Graph

VALVE TORQUE 150#
VALVE SIZE		5 Bar	10 Bar	20 Bar
MM	Inch	N-m	N-m	N-m
50	2″	11	15	21
65	2-1/2″	20	28	38
80	3″	38	43	63
100	4″	50	58	80
125	5″	73	100	144
150	6″	113	144	181
200	8″	175	219	350
250	10″	294	331	375
300	12″	400	450	625

CV Values
VALVE SIZE		10°	20°	30°	40°	50°	60°	70°	80°	90°
MM	Inch
50	2″	2	5	11	19	28	41	58	77	85
65	2-1/2″	2	9	20	28	45	60	80	120	130
80	3″	3	10	22	42	64	96	150	157	160
100	4″	6	17	41	75	116	174	273	284	290
125	5″	6	45	75	170	280	478	650	707	795
150	6″	7	51	119	221	340	510	799	833	850
200	8″	4	103	239	445	684	1026	1607	1676	1710
250	10″	50	151	353	655	1008	1515	2369	2470	2520
300	12″	79	236	552	1024	1576	2364	3704	3861	3940

Dimensions are in mm
VALVE SIZE		L	ØE	ØD
MM	Inch
50	2″	47	50.8	95
65	2-1/2″	52	61.6	108
80	3″	52	72	127
100	4″	57	100	159
125	5″	60	123	186
150	6″	60	143	217
200	8″	67	192	270
250	10″	72	239	322
300	12″	75	290	382

Dimensions are in inch
VALVE SIZE		L	ØE	ØD
MM	Inch
50	2″	1.88	2.032	3.8
65	2-1/2″	2.08	2.464	4.32
80	3″	2.08	2.88	5.08
100	4″	2.28	4	6.36
125	5″	2.4	4.92	7.44
150	6″	2.4	5.72	8.68
200	8″	2.68	7.68	10.8
250	10″	2.68	9.56	12.88
300	12″	3	11.6	15.28