Sundan Technologies offers a range of Butterfly Valves designed for various applications, featuring options like multi-pressure stages and special designs to prevent jamming. These valves are known for their unique shape, lightweight frame structure, and easy seat replacement. They cater to different control needs (on-off, modulating, intelligent) and are suitable for water and liquid mediums. Available in a variety of sizes, pressures, and temperature ranges, these valves ensure versatility for industrial needs. Materials for the body, disc, and seat include stainless steel, ductile iron, and more, with options for electric, pneumatic, or manual operation.

Design Feature

1. Optional multi-pressure stage
2. Special design will not cause death card
3. Torque and lighter, easy to replace the seat
4. Unique shape
5. Frame structure
6. Coated disc

Design Feature

1. Medium can flow through the body directly for little resistance and high flow capacity.
2. The body and upper cover could be made of carbon steel,austenitic stainless steel or special alloy material.
3. The sulfur-free flexible v-graphite is heat resisting,we shall ensure the service life of packing is long-term without maintenance by increasing pre-pressure on spring gasket.
4. The self-sealing packing structure is tested 100,000 times (full travel) to ensure zero leakage and constant friction.When the stem moves at low friction state,we can get the long-term steady precision of control valve .
5. The seat adopts multi-level structure, the sealing surface is composed of metal and special non-metal materials to ensure zero leakage.
6. The shaft center deviates from the valve center bi-directionally. The asymmetric design sealing surface allows the disc to revolve in 0-90° freely.
7. Triple offset with metal seat design.

Design Feature

1. Life of up to one million times
2. Good sealing performance, easy to replace
3. Valve pressure rating 740 psi, Maximum operating temperature 400°F at 100 psi, Lug style, Glass reinforced PTFE seats, Blowout proof stem, Stainless steel disc and stem, Integrally cast disc stop, Dual offset design, Direct mount actuation, Operating mechanism: Bare stem, infinite position plate and lock, lever lock, manual gear operator and pneumatic/electric automation
4. MSS SP-68 (design) 100% production tested, MSS SP-25 (markings), API 609 seat pressure/temperature ratings/blow-out proof stem, ASME/ANSI B16.34A, body pressure/temperature ratings, ASME/ANSI B16.5 flange dimensions, ISO 5211 EN 12116 actuator mounting top works, ANSI Class 300

Design Feature

1. Horizontal pin: Reduce the exploding possibility of stem effectively under the internal unbearable pressure.
2. Disc: There is no stem through disc completely for less resistance and more flow capacity.
3. Stem: The design of two section of stem, can enhance the stability and resistance of disc effectively.
4. Guide bearing: It is made by nylon and can ensure that the shaft rotate in absolute center,to decrease friction and torque.
5. The seat with backrest: It is consisted of inner backrest and outer rubber.the backrest can withstand the deformation of seat when it is scoured and squeezed to extend service life.

Standard

1. Valve body is designed to meet MSS SP-67 and API609.
2. Upper flange standards: Valve mounting flange and stem shall be per ISO 5211.
3. Flange Standard: GB 9113.1N ANSI 150 B16.5 , JIS B2211.
4. Pressure Rating:
5. Bi-directional bubble-tight shut off to: 16 bar(230psi) DN40~DN600mm
6. And tested to 110% of full rating: 18 bar(260psi) DN40~DN600mm
7. Shell Testing:
8. The body strength can stand 150% of full rating: 24 bar(340psi) DN40~DN600mm

Main Features

1. Tight sealing and zero leakage under rated pressure(1.0Mpa~1.6Mpa).
2. Multi-sealing design separates valve body from working medium to ensure zero leakage.
3. Main parts are designed to fit exactly into each other to ensure a better sealing, smaller torque, bigger flow, lower fluid resistance as well as flexible two-side flow.
4. Scientific design for the sealing surface of valve seat makes a closed connection between the valve and the pipe flange without any additional ccessories.
5. Designed and produced based on multi-standard system, so the valve could be applied to various of flange and enjoy excellent interchangability.
6. All parts are embalmed, suitable for various complex work environment.
7. Others: According to customer requirements.

Design Feature

1. Optional stainless steel body
2. Applicable chemical medium
3. Flange contection
4. Disc in the hole under the friction surface using spherical design, torque is smaller, better sealing

Main Feature

1. Uses the center-line type structure
2. Easy installation, low flow resistance, large circulation
3. Applied to chemical, building materials, power station, glass industry etc
4. Small flow resistance, high turnover
5. Temperature up to 1100°C
6. Sealing performance up to 1%
7. Medium can flow through the body directly for little resistance and high flow capacity
8. The body and cover could be made of carbon steel,austenitic stainless steel or special alloy material
9. The sulfur-free flexible v-graphite is heat resisting ,we shall ensure the service life of packing is long-term without maintenance by increasing pre-pressure on spring gasket
10. Center line-type butterfly valve uses metal sealing seat,which surrounds the disc to reduce the leakage effectively

Design Featurer

1. Body: The body is welded by steel plate for lighter weight .smaller volume,lower cost,and choosing high temperature resistant material can withstand higher
2. temperature.
3. V type packing: The sulfur-free flexible v-graphite packing overcomes the faults of normal packing including zero compensation and large deformation,
4. prolongs the service life, and is able to with stand high temperature.
5. Seat: The seat ring can reduce leakage and ensure the disc close to 0°.
6. Disc: The disc is made of steel plate,and stiffeners in both sides can make it withstand deformation due to wind effectively.
7. Ring: The ring has a location effect,which makes the disc turn in the middle of channel.

Standard

1. Valve body is designed to meet IEC60534-3-1-2001 and GB/T 12221-2005 API609
2. Valve mounting flange shall be per ISO 5211
3. Flange Standard: JB/T79.1-94,JB/T79.4-94. HG20616-97,ANSI B16.5,ANSI B16.47
4. The highest pressure: 1 .OMPa, Temperature range: -196°C ~1100°C
5. Leak standard: ANSI B16.104