Worm Gear Flange Triple-eccentric Laminated Seat Metal To Metal Seal Butterfly Valve

Specifications Worm Gear Flange Triple-eccentric Laminated Seat Metal To Metal Seal Butterfly Valve

1.Zero leakage;

2.Stellited body seat.

Worm Gear Flange Triple-eccentric Laminated Seat Metal To Metal Seal Butterfly Valve   1. Purpose: Triple-eccentric metal to metal seal butterfly valves designed in triple offset construction, laminated seal or metal to metal seal that can withstand high temperature and high pressure special for long service life and provides energy saving. The high performance butterfly valve are designed as a device to shut-off or regulate the working medium flow and installed in industrial pipelines with corrosive medium in metallurgy, iron and steel industry, power plant, petroleum, chemical industry, heat supply, inflammable gas, municipal water supply and drainage and etc.   As the latest technology achievement, triple-eccentric butterfly valves provide a variety of tyoes to meet different face to face dimensions, such as wafer type, lug type, flanged type, ring-joint type, butt weld type and jacketed type. It is suitable for acid alkali and other corrosive medium with both high and low temperature due to wide material selection. Especially in large-diameter butterfly valve, it is continusously replacing the shut-off valves such as gate valves and ball valves with its advantage of zero leakage; Meanwhile it is also continuously replacing the regulating valves such as globe valve with its excellent performance in regulation and control.   3. Features: 1) High performance triple eccentric patent sealing system laminated seat ring: Zero leakage sealing in bi-directional (As per DIN Class 1 or ANSI Class VI); Massive seat ring: Bi-directional tight sealing (As per ANSI Class V); 2) Excellent for isolation and control of gases and liguids; 3)Wleded-in stinless steel or stellited body seat special for long life service; 4) No friction, wear and galling in the seat (Compression only); 5) Easy replaceable and adjustable seal ring; 6) Applicable to harsh working condition such as high temperature, high pressure and corrosive conditions; 7) Metal to metal seal up to +600 °C; 8) Self-compensating for process temperature variances; 9) Low operation torque and reliable seated torque; 10) Inherent fire-safe design.   3. Standard:

Design & Manufacture	AWWA C504 / API 609
Flange Connection	AWWA C207 / ASME N16.5 / ASME B16.47
Face to Face Dimension	AWWA C504 / API 609
Test & Inspection	AWWA C504 / API 598

  4. Technical date: 1)

DN	2"~60"	2"~48"
PN	150LB	300LB
Shell Test (MPa)	3.0	7.5
Seal Test (MPa)	2.2	5.5
Air Tight Test (MPa)	0.6	0.6

  2)

Leakage Rate	Conformance with API 598
Applicable Temperature	Carbon Steel: -29°C ~ 425°C; Stainless Steel: -40°C ~ 550°C; Cr-Mo-V Steel: -40°C ~ 550°C; Cr-Mo-V Ti Steel: -40°C ~ 550°C;
Applicable Medium	Fresh water, sea water, sewage, air, steam, food, meducines, petroleum products and all kinds of weak corrosive medium, such as oil, acid, alkali, salt, etc.
Operating Type	Manual, worm gear, electrice, pneumatic, hydraulic, electro-hydraulic, etc.

  5. Material Specification:

Ref	Description	Material
1	End Cap	Carbon Steel, Stainless Steel
2	Gasket	S.S+Graphite Sprial Wound Gasket, PTFE
3	Thrust Ring	Carbon Steel, Stainless Steel
4	Bushing	Self-lubricating
5	Body	Ductile Iron, Carbon Steel, Stainless Steel
6	Seat Ring	Laminated ot Metal to metal
7	Disc	Ductile Iron, Carbon Steel, Stainless Steel, Alloy Steel
8	Shaft	2Cr13, 1Cr18Ni9Ti, 304, 316, 316L Stainless Steel
9	Shaft Pin	2Cr13, 1Cr18Ni9Ti, 304, 316, 316L Stainless Steel
10	Packing	Flexible Graphote
11	Packing Gland	Carbon Steel, Stainless Steel, Aluminium Bronze
12	Yoke	Cast Steel
13	Worm Gear	Cast Iron, Ductile Iron,
14	Hand Lever, Hand Wheel	Ductile Iron, Malleable Cast Iron, Carbon Steel