The butterfly valve, in comparison to other valves, has structural advantages such as simple construction, compact, lightweight, and being piping work friendly, it has various functional advantages, such as suitability for automated operation by open/close with 90 Degree action and excellent fluid controllability, so that it is adopted in vast fields.
KITZ Butterfly Valves
KITZ established a rich product line-up by preparing systematic series in accordance with application of butterfly valves in order to meet a wide variety of user needs.
This newly developed “New Innovation” has made it possible to get “Higher Inner Dia in same dia pipe”, which can give more flow, at lesser time than any other piping technology. Along with the existing unique feature, i.e. Glass Reinforcement Technology to Flame Retardant V2 Technology, we have added two more merits as more flow due to higher inner dia and UV resistant with Carbon content with Internationally recognised colour coding “blue”. Our continuous blue-black strips on the pipe with its own significance are our Trademarks and applied for design copyright to make this our unique identification.
Standard Materials
| Parts | Materials |
|---|---|
| Body | Aluminium die-cast/equivalent ASTM B85-84-383.0 |
| Neck | 304 stainless steel |
| Stem | Equivalent ASTM A276 type 410 |
| Disk | A351 Gr. CF8M |
| O-ring | EPDM |
| Rubber seat | EPDM |
| Bottom stem | Equivalent ASTM A276 type 410 |
| Bearing | Metal backed PTFE (Size 10” and 12”) Polyphenylenesulfide (10XJMEA: size 1 ½” to 8”) Bronze: CAC401C (PN16XJME: size 2” to 8”) |
Features of KITZ Butterfly Valves
S-shaped spherical disc for sealing performance (patented)
KITZ’s original cross sectional S-shaped valve discs with spherical surfaces make evenly tight contact with rubber liners for excellent sealing performance with reduced operating torque. Complete 360* shut-off mechanism help to extend the service life of rubber liners. (Size. > 2 Inches)
Carefully designed KITZ EPDM seats have unique features that ensure their functional stability, high sealing performance and long life:
• Self-reinforced ribbing
• Wide disc seating contact
• Dual stem seal bearings
- 1. Wide disc seating contact for high sealing performance.
- 2. Reinforced ribbing minimizes valve operating problems such as distortion, skidding and exfoliation of rubber liners caused by line pressure load and friction with metal discs.
- 3. Stem seal bearings are assembled on the top and bottom stems for stable sealing.
- 4. Gasket less flange sealing contact for easy valve mounting.
Types of Butterfly Valves
I. Long Neck Butterfly Valve
Features:
• A long stainless steel neck reduces conductivity of the fluid heat for prevention of dew condensation
• Availability of valve body and neck insulation
• Choice of actuators for automated valve operation
Application:
• Building utilities
• Piping networks for cold water, hot water and other water supply
Valve Insulation:
• Insulation is recommended for area in blue
Dew Condensation Test:
Sample of KITZ XJ series butterfly valve equipped with long necks (KITZ Product Code: G-10XJMEA) were tested at the KITZ laboratory under the conditions listed below. The lower surface temperatures of gear boxes, ambient temperatures and ambient humilities were measured as the variable functions. The dew conditions were measured as the variable functions. The dew condensation boundary was estimated as illustrated below.
Test Condition:
1) Line fluid: +5*C cold water
2) Atmospheric temperature range: +20*C to +40*C
3) Valve insulation: 50mm glass wool (JIS A 9501) around the test valve with gear boxes exposed to open air
Types of long neck butterfly valves
• Gear operated
II. Short Neck Butterfly Valve
Features:
• Suitable for piping in a limited space
• Choice of actuator for automated valve operation
Application:
• Building utilities
• Plant facilities
• Water treatment facilities
• Industrial machinery operation
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