Cryogenic Butterfly Valve

Jerry — Mon, 20 Jun 2022 09:01:32 +0000

ZECO Valve offers a series of cryogenic valves of proven high quality, as demonstrated by technical evidence. We offer stainless steel and cast carbon steel gate, globe, check, butterfly and ball valves for processing, storage, shipment and distribution of cryogenic fluids down to -196℃.

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What is a Cryogenic Butterfly Valve?

ZECO butterfly valve for cryogenic service is designed for tight shut off and throttling service. The disc movement is Triple offset .This eliminates concentrated wear points on the sealing ring and extends it’s lifetime. Standard body patterns are flanged and butt welded types. Butt welded type has extended body to prevent heat conduction to the sealing area during welding installation. An inspection door on top of the body enables easy inspection, maintenance and replacement of inner parts without the need to remove the valve or to cut the pipe. To prevent internal stress in the bonnet during the cool-down period, all bonnet joints are bolted. This bonnet is extended to ensure that the gland area remains free from freezing even for temperatures down to -196˚C. The valve can be installed with the shaft in any direction. The topflange drilling is according to ISO 5211 standards to fit a large range of gears and actuators.

Product Range of Cryogenic Butterfly Valve

Butterfly valve for Cryogenic Service (-196 to ~ +100 degr. C)
Pressure Rating : Vacuum up to 75 bar (CL 300)
Size: 100 mm(4 inch) up to 600 mm (24 inch)
Bi-directional design. Working pressure 10barg
With butt-welding ends or flanged ends
With inspection / maintenance access (side entry)
Double offset shaft (For tripple offset metal seated type see page 9)
Solid double piece shaft
Valve may be fitted in any orientation
Standard Compliance : BS 6364 Valves for cryogenic service
Fire Safe approved in accordance with BS 6755
Extended bonnet / shaft for safe access

Applications of Cryogenic Butterfly Valve

The most typical applications for the cryogenic valves are natural gas, receiving terminals for LNG, LNG trains, LNG storage, LNG carriers, etc. ZECO products are also used across a wide spectrum of industries, e.g. chemical and petrochemical, nuclear and conventional power stations, offshore and widely in the industrial gas industry.

Features of Cryogenic Butterfly Valve:

Cryogenic by design
- Cryogenic Butterfly valves are specifically designed for sub-zero line temperature services. These valves handle cryogenic fluids efficiently and reliably with minimum maintenance requirements
Compact for better temperature control
- The compact size of the wafer and lug style valves permits minimum temperature stabilization times on either line heat-up or cool-down.
Application flexibility
- The stainless steel materials of construction provide for maximum service flexibility and media applications.
Designed for actuation and easy adjustment
- Integrally welded shaft and bonnet extensions enable valve actuators to be mounted well above pipeline insulation and provides for easy adjustment of the stem packing gland pressure

Material of Cryogenic Butterfly Valve

No	Part	Material
1	Body	ASTM A351 CF3M
2	Seal Ring	Graphite + SS316L
3	Retainer Flange	ASTM A182 F316L
4	Pin	ASTM A276 316L
5	Disc	ASTM A351 CF3M
6	Stem	ASTM A276 316L
7	Stem Packing	Graphite
8	Stem Beating	SS316L + R.TFE
9	Bolt	ASTM A193 B8M
10	Nut	ASTM A194 8M
11	Yoke	ASTM A351 CF3M

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Stainless Steel Butterfly Valve

Jerry — Sun, 19 Jun 2022 14:50:15 +0000

Butterfly valves have a very simple working mechanism that is extremely advantageous to the applications it services. If you need to learn more about butterfly valves, ZECO Valve is a reputable butterfly valve manufacturer.

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What is a Stainless Steel Butterfly Valve?

A stainless steel butterfly valve is a valve that is made of stainless steel material. Although this valve is made of steel, other internal components like seats, seals, O-rings, and gaskets can be made of different materials like plastic, rubber or other material. The type of material used to make those internal components determines the type of media and temperature the valve can be used on. SS butterfly valves made of fully metallic materials are suitable for use in both low and high temperatures because metallic materials can withstand high levels of thermal heat. Stainless steel butterfly valve manufacturers design these valves for heavy-duty and harsh conditions. As such, these valves are very strong and they can withstand high pressure and slurries flawlessly. SS butterfly valves operate manually or automatically. These valves’ operation depends on the hand wheel’s quarter turn to start or stop fluid flow. The quarter turn of the handwheel makes these valves fast operating and less tedious relative to other valves that need multiple turns to operate.

How does a Stainless Steel Butterfly Valve work?

Stainless Steel Butterfly valves have a relatively simple construction. The main components of a butterfly valve are the body, seal, disc, and stem. A typical butterfly valve has the disc positioned in the center of the connected pipe and a stem that is connected to an actuator or handle on the outside of the valve. In the closed position, the disc is perpendicular to the flow and is sealed by the valve seat. The stem is also sealed by using an o-ring. When the actuator or handle rotates the butterfly valve stem back 90 degrees, the disc moves away from the butterfly valve seat and positions itself parallel to the flow. Partial rotation allows for the flow to be throttled or proportional.

Features of Stainless Steel Butterfly Valves

ZECO stainless steel butterfly valve combines the three offsets of the seating surface with the flexibility of graphite lamination to achieve a tight and uniform seal with a low required torque;
The double anti blow out design of ZECO stainless steel butterfly valve satisfies API 609 and ASME B31.1 requirements through both internal and external stem retention;
The laminated seal rings of ZECO stainless steel butterfly valve are designed to self align and allow valves to meet zero leakage per API 598;
The shaft of ZECO stainless steel butterfly valve is fully guided by shaft beearing and gland follower to reduce side load due to line pressure thrust.

Applications of SS Butterfly Valves

SS Butterfly valves are often used in pharmaceutical, chemical including food industries. This valve can also be used in wastewater treatment facilities, fire protection services, and fuel handling. Generally speaking, the butterfly valve can handle large volumes and slurries.

Material of Stainless Steel Butterfly Valve:

No	Part	Material
1	Body	ASTM A351 CF8
2	Seal Ring	Graphite + SS304
3	Retainer Flange	ASTM A182 F304
4	Pin	ASTM A276 304
5	Disc	ASTM A351 CF8
6	Stem	ASTM A276 304
7	Stem Packing	Graphite
8	Stem Beating	SS304 + PTFE
9	Bolt	ASTM A193 B8
10	Nut	ASTM A194 8
11	Yoke	ASTM A216 WCB

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Butterfly Valve By Material – ZECO Valve