Flanged Butterfly Valve

Festures of Flanged Butterfly Valve

 

• Bidirectional sealing, no flow direction of the medium;
• Valve body vulcanized EPDM, reliable sealing;
• A dial with an opening indication showing the position of the disc switch;
• Flow characteristics straight line, good regulation performance.

Flanged Butterfly Valve Working Principle

The rotary center of the flanged butterfly disc (that is, the center of the stem) is located on the centerline of the valve body and the sealing surface section of the disc. When the disc is closed, the disc’s circular sealing surface squeezes the synthetic rubber seat so that the seat produces elastic deformation and forms the elastic force to seal the butterfly valve. If the remote control is required, different types of electric devices can be equipped according to different working conditions.

Flanged Butterfly Valve Installation and Commissioning

Clean the inner cavity and sealing cover of the valve before installation. This butterfly valve can be installed on the horizontal, vertical and any Angle pipe, and can be used in both directions. The butterfly valve must be in the closed position during installation to ensure that the disc does not collide with the pipe flange. Make sure the flange welding is correct. After the butterfly valve is installed, it is not allowed to weld the flange again, so as not to burn the rubber parts and the anti-corrosion coating. For specific use, please consult ZECO Valve Group.

Flanged Butterfly Valve Material and Standard

Size Range: 2″~48″

Pressure Rating: 10bar ~ 25bar

Face to Face Dimensions: AMSE B16.10, EN558-1

Flange End Dimension: AMSE B16.1/16.42, AS4087, EN1092-2

Coating: Fusion Bonded Epoxy Coating

Inspection and Test: ISO 5208 / EN 12226-2

Part	Material	Standard
Body	Ductile Iron	EN 1563/DIN 1693
Disc	Ductile Iron	EN 1563/DIN 1693
Seat	EPDM / NBR	ISO 4633
Stem	Stainless Steel 431	EN10088-1/ASTM A959
Bolt	Stainless Steel 431	EN10088-1/ASTM A959
Worm Actuator	Ductile Iron	EN 1563/DIN 1693
For the materials options not listed, consult factory. ZECO manufactures valves in more than 50 different alloys.

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Lug Butterfly Valve

Features of Lug Butterfly Valve

• Low opening torque, Radial dynamic balance sealing system is adopted, so that the forces on both sides of the inlet and outlet of the disc are roughly balanced;
• Self lubricating bearing to reduce operating torque and avoid locking the valve stem infrequent opening and closing conditions;
• Better Seal ring material, seal is made of stainless steel sheet with graphite/carbon fiber/PTFE, etc. More wear-resistant, impact-resistant, reliable, and environmentally friendly than rubber asbestos sheet material;
• Packing-combined sealing system, ensure that the maximum leakage of the valve can reach ≤20ppm. The dynamic sealing structure can be used if necessary so that the packing seal is in good condition and the free maintenance period of the packing is extended.

Lug Butterfly Valve Working Principle

Lug type butterfly valve has two options of fixed seat and floating seat, which can be repaired without leaving the site, which can shorten the repair time and greatly improve the efficiency. Fixed seats are suitable for valves where the medium flows forward, so the seal is only for one direction and the flow direction should be noted when installing. Although the valve seat is fixed, the sealing of the valve flap can still be removed. If the valve has a floating seat, it can be installed in any direction.

Lug Butterfly Valve Installation and Commissioning

Wafer lug type butterfly valve should be stored in a dry, ventilated room, and the valve channel should be blocked at both ends. Long-term storage of the valve should be regularly inspected and cleared of dirt. Special attention should be paid to the cleaning of the sealing surface to prevent damage to the sealing surface. For specific use, please consult Zeco Valve Group.

Lug Butterfly Valve Material and Standard

Size Range: 2″~48″
Pressure Rating: 150LB ~ 300LB

Face to Face Dimensions: API 609, EN558

Flange End Dimension: EN1092, ASME B16.5, ASME B16.47, AS2129

Inspection and Test: API 598

Part	Material	Standard
Body	GGG40/WCB/CF8M/MONEL	ASTM STANDARD
Disc	GGG40/WCB/CF8M/MONEL	ASTM STANDARD
Stem	SS420/SS410/SS316/MONEL	ASTM STANDARD
Seat	HARD SEAL/PTFE/GRAPHITE	ASTM STANDARD
For materials options not listed, consult factory. Zeco manufactures valves in more than 50 different alloys.

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Wafer Butterfly Valve

Festures of Wafer Butterfly Valve

• simple and compact in structure, light in weight, easy to assemble and repair;
• Small operation torque, turn 90° portable rapid opening and closing;
• Small flow resistance, the energy saving effect is good;
• Reliable sealing, leakage is zero, long service life.

Wafer Butterfly Valve Working Principle

Large diameter can be increased due to the increase of torque, which can be increased by adding a turbine head or electric actuator. Electric actuators can be equipped with common type, household type, explosion-proof type and regulating type according to different working conditions, which can realize remote control and computer networking.

Wafer Butterfly Valve Installation and Commissioning

This valve must be equipped with butterfly flange. Put the butterfly valve into the middle of the special flange at both ends of the pipeline, and use the double head bolt through the pipeline flange and clamp butterfly valve to lock tightly, then it can be used normally. For specific use, please consult ZECO Valve Group.

Wafer Butterfly Valve Material and Standard

Size Range: 2″~48″

Pressure Rating: 10bar ~ 25bar

Face to Face Dimensions: EN 558-2008

Flange End Dimension: EN1092-2, ISO 7005-2

Coating: Fusion Bonded Epoxy Coating

Inspection and Test: EN 1074-1 and 2, EN 12266

 

Part	Material	Standard
Body	Ductile Iron	EN 1563/DIN 1693
Disc	Ductile Iron	EN 1563/DIN 1693
Stem	Stainless Steel 431	EN10088-1/ASTM A959
Handle	Ductile Iron	EN 1563/DIN 1693
Seat	EPDM	ISO 4633
Bushing	CuZn39Pb1 / C37000	EN12167/ASTM B135
For the materials options not listed, consult factory. ZECO manufactures valves in more than 50 different alloys.

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What is 4 in Butterfly Valve?

ZECO 4 inch butterfly valve is made of body, disc, stem, seat, stuffing box, gear, etc. ZECO butterfly valve is the most commonly used size on small pipelines, so there is a problem with stocking. Problems when stocking is almost the same with the preparation of delivery. Time is the key factor, usually, the gate valve stocking period is decided by its sealing material. If the valve has to be stocked for several weeks or months, better stocking conditions are needed. Valve is usually stocked indoors and its stocking ambient temperature shall be higher than the dew point. If valves are stocked outdoor, support the valve to make sure it does not contact the earth, at the same time, a water-proof cover shall be added to the valve.

Overview of 4 inch Butterfly Valve

• Body Material: Epoxy Painted Ductile Iron / Carbon Steel / Stainless Steel
• Size and Connection: 4 inch Wafer, RF, RTJ
• Seats: EPDM
• Disc: Stainless Steel
• Actuator: 10-position manual lever (lockable in any position)

Dimensions & Weight of Butterfly Valve 4 Inch

Features of 4 Inch Butterfly Valve:

• 1. ZECO 4 inch butterfly valves are easily maintained. At any time pay attention to the sealing surface and shaft seal, When the sealing surface has abrasion or leakage, Generally, use the pressed seal of the screw plate to resolve, when the leakage occurred in the larger, the inner ring can be adjusted plus-one-chip be resolved, if there is damage to seals, plate seals can be removed, the replacement of seals, when the seal leakage, adjust packing gland or seal ring replacement;
• 2. The Double offset design of ZECO 4 inch butterfly valve is less abrasion, and has excellent sealing capacity;
• 3. The limit switch device of ZECO 4 inch butterfly valve ensures the right position of open / close;
• 4. The body, disc, and stem of ZECO 4 inch butterfly valve have sufficient strength and flexibility, sealing can be changed inside the valve.
• Long service life with reliable seal and without frequent maintenance.
• Pressure Loss
  • Too much pressure loss will bring an increased cost of correlative energy. Butterfly valves have flow characteristics three times better than globe valves, and about 75% of a same-size gate valve.
• Multi-Function
  • Flange butterfly valve can be used for on/off service and throttling. They are superior in Multi-function as compared to gate valves. Butterfly valves can be widely used in the chemical field due to trim options and the choice of elastomeric liner.
• Weight
  • Flange butterfly valves have features of being light in weight and small in size, for example, the weight and size of a 10” butterfly valve are 1/9 and 1/6 of a 10” gate valve. So, the butterfly valve is easy to be installed and saves the cost of the piping system.
• Bubble Tight
  • Butterfly valves with resilient seat design can be bubble tight as compared to the metal seated gates or globe valves.
• Easy of operation
  • Butterfly valve offers a 90-degree open to close.
• Maintenance
  • Properly installed flange butterfly valves are self-cleaning and are less susceptible to failure due to trash material in the pipe.

Material of 4 Inch Butterfly Valve:

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What is a 6 Inch Wafer Type Butterfly Valve?

6 inch butterfly valve for on-off control of air, oil, and other media compatible with the materials of construction. Wafer style valve sandwich mounts between customer-supplied ANSI /ASME Class 150 and other international standard flanges.

Dimensions & Weight of 6 Butterfly Valve

Installation of Butterfly Valve 6 inch

ZECO provides detailed installation instructions to ensure high performance and long service life of the 6 inch butterfly valve. The capacity of piping flanges and valves depends on the deformation of gaskets. The acting force of bolting not only resists force to loosen the connection but also keeps necessary compressing stress. Take note of the force does not exceed the gasket load and pressure load.

In order to ensure a good connection, the following instructions shall be noted.

• Check flange surface, if any defect appears leakage, groove or impress, repair before installation;
• The installation requests of Cast iron flange are more than the ductile cast iron. Proposed to use low-strength steel Bolted to reduce as a result of the excessive pre-compression flange of the possibility of exceeding the prescribed stress. To fit a flat flange gasket in the flat flange to prevent excessive torque of bolt flange damage. Should not be confused with convex planar flange of the loaded flange In the cast iron flange connection is particularly important that the top is installed on the better to ensure that in the absence of excessive load bolted gasket circumstances make an appropriate compaction force;
• Gaskets have the capacity of resisting deformation and damage;
• Check the centration of assemble-part flanges, Lubricate the threads of boltings. Boltings shall be fastened sequentially to make sure level contact between the flange and gasket.

Features of 6 Butterfly Valve:

• Unique wave line seat and disc shape reduce the required torque and extend the life of the valve.
• The disc seat is vulcanized to a phenolic backup ring guaranteeing positive control of seating torque while eliminating seat distortion.
• Precision machined 316SS disc with two-piece stem (shaft) construction, enhances the flow capacity of the valve and reduces turbulence.
• Stem utilizes PTFE/graphite bearings with V-type ring seals to prevent leakage.
• The bracket connected with the drive device conforms to ISO5211 standard;
• The stem is designed to meet API 609 requirements with a blowout-resistant design.

Material of 6 Inch Butterfly Valve:

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What is a High Performance Butterfly Valve?

Specifications of High Performance Butterfly Valves

Features of High Performance Butterfly Valve:

• The resilient seat design of ZECO high-performance butterfly valve is designed to provide a more optimized solution for the field with wear-out and low torque requirements, and to easily replace the seat after seat damage without the need for special tools;
• ZECO high-performance butterfly valve is equipped with composite bearings on the stem above and below the disc. The composite bearings have PTFE and epoxy filament winding, which reduces torque in the switch and reduces wear between the stem and the body for longer service;
• ZECO high-performance butterfly valve’s fireproof bi-directional resilient seat design ensures zero leakage of the valve during normal operation. The metal-to-metal seal of the seat after fire meets or exceeds the industry “fire safety” specification;
• The gland flange design of ZECO high-performance butterfly valve applies load against the packing gland to prevent external leakage. Fully adjustable.
• ISO 5211 top plate for direct mounting of a wide range of actuators, handles, and gears
• Adjustable stem packing features pull down gland with easy access without removal of the actuator
• Tangential wedge pins are offset from the center of the stem putting them in compression rather than shear
• Disc stop is designed to prevent disc rotation in the wrong direction and potential seat damage
• Retainer clip provides blow-out proof stem
• Live-loaded stem seal system by a set of Belleville springs. Rocker shaped gland bridge compensates for uneven adjustment of gland bolts
• “Bear-X” bearing has excellent thermal, chemical, and wear resistance
• One piece body with extended neck
• Self-energizing flexible lip seal soft seat design. Two points of contact on fire-safe metal seat design

Applications of High Performance Butterfly Valve

High Performance Butterfly Valve Manufacturers

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What is Butterfly Valve?

What are the Types of Butterfly Valves?

Large Butterfly Valve for Sale

• The internal side of the valve shall be cleaned with no dregs and stains to keep the cleanness and dryness of the valve.
• Valve closure parts shall be in the state of closing. If the valve should be lifting, be cautious when lifting, throwing, or falling down is utterly forbidden, especially hand-wheel and stem shall not be the lifting point. ZECO, as the manufacturer of super-large size butterfly valves, devotes itself to researching and designing the problems that may occur in the production or even the delivery to the users when they store the products, and then gives corresponding advance plans to prevent the possible occurrence.

Large Butterfly Valve Cost

Features of Large Butterfly Valve

1. ZECO 96 inch large butterfly valve can be chosen double offset rubber seat. NBR seats are sulfured into the framework increasing the sealing performance. The disc surface is designed into sphere type to reduce contacting area and frictional force;
2. ZECO large butterfly valve can be chosen double offset PTFE seat. A surplus between the PTFE seat and disc ensures the seal in low pressure;
3. ZECO large butterfly valve can be chosen triple offset metal seat;
4. ZECO large butterfly valve can be chosen double offset metal seat.

Centric Type Butterfly Valve Details

Eccentric Type Butterfly Valve Details

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What is 8 Inch Butterfly Valve?

Butterfly valves service high-performance fire protection systems and are available in a broad size range with wafer lug, grooved, or press end connections. Butterfly valves provide bi-directional dead-end service in commercial and industrial service and can provide many maintenance-free cycles and still accommodate “bubble tight” shut-off.

ZECO 8 inch butterfly valve adopts rubber or Teflon material as sealing face, this structure is able to reduce. Butterfly valve is able to be used on various pipes, which shares many advantages: such as its structure is compact, closure is fast, sealing capacity is tightened, the operation is easy, and life-extension is long. During the process of closure, abrasion is small. Because the valve is designed as double offset structural, when the valve is fully open, disc sealing is in the state of loosening. When the valve is fully closed, the seal ring is compressed by the body and disc, thus causing the deformation, this kind of flexible sealing maximizes sealing capacity. Sealing face precisely cooperates with the body, sufficiently avoids medium flushing, and prolongs the valve’s life extension. Valve has the complex structure for a pressure vessel and operational machine, maintaining the valve, occasional open/close shall be put into consideration; At the same time, mainly static pressure state of valve shall also be considered. Keeping the valve to a certain position, the operational capacity of the valve may be reduced, this is caused by the accumulation of corrosive substances on moving parts. Under some circumstances, the valve shall be circulated open/closed periodically. The intactness of pressure boundary required the intactness of pressure-bearing parts, pressure-bearing shall be checked regularly.

Standards of 8″ Butterfly Valve

Dimensions & Weight of Butterfly Valve 8 Inch

Material of 8 Inch Butterfly Valve:

Features of Butterfly Valve 8 Inch

• ZECO 8 inch butterfly valve can choose metal to metal seat ring or resilient seat ring;
• The yoke of ZECO 8 inch butterfly valve is designed according to ISO 5211 standard and connected with an electric actuator, pneumatic actuator, hydraulic actuator, and manually operated;
• ZECO 8 inch butterfly valve has a replaceable sealing ring design;
• If ZECO 8 inch butterfly valve chooses metal to the metal structure, it can have a fire safety design and structure, the metal seated structure makes the valve fire-safe and meets the requirement in API 607.
• Minimal loss of pressure
• Easy to open and close
• Good leak tightness
• Compact design
• Easy movement of the disk should be controlled during the assembling

Applications of 8″ Butterfly Valve

• Heating air-conditioning systems
• Water purification system
• Mining industry
• Shipbuilding
• Chemical industry
• Food industry
• Oil and gas industry
• Fire extinguishing system

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