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HOME    Product Introduction    Over-rotation Limiting Butterfly Valves
 
This valve has been developed for the systematic management and water resources development of efficient irrigation facilities. In other words, the most important facility in the development and management of irrigation facilities is the valve under the circumstances where the importance of the water has emerged due to lack of water. Thus the valve can maintain the best features and optimum facilities state for the relevant facility. When problems occur, the valve can provide the fastest and most economical measures..

  Certification Details

  • Excellent supply product (No. 2,010,213) : Over-rotation limiting butterfly valves

  • Patent (No. 10-0927965) : The butterfly valve with a fabricated rotation limiting means

  • Patent (No. 10-0927361) : Butterfly valves with improved sealing capabilities

  • K mark (PB12010-162) : Over-rotation limiting butterfly valves

  • Gun Ja mark (No. 2010-077) : Over-rotation limiting butterfly valves

  • Quality Management System Certification ISO9001 (AJA01/NO.3693, Aza Korea International Certification)

 
 
  Specification
Aperture 50A~2000A
Operating Pressure 4.5 / 7.5 / 10 / 16kgf/cm2
Purpose Used for the flow control and block in water purification plants, sewage disposal plants, pump stations, drainage pumping stations, and rainwater pumping stations, etc.
Driving Mechanism Manual, electric, pneumatic, hydraulic
Joint Method Flange joint
Standards KS B 2333, JIS B 2064 etc
 
 
  Product Development Background

  1) The need of over-rotation limiting butterfly valves

The various valve facilities for water supply, agriculture, industry, and drainage are facilities that play an important role among plumbing equipment by being installed in the pipeline for the purpose of blocking, control, adjustment of the water pressure, backflow prevention and so on. Thus, the valve is divided into usage, structure, type, material, etc, respectively and each has its unique characteristics. Therefore, it is important to apply the optimized valve. However, even though it seems that there is no need for maintenance of the valve due to its robustness with respect to the selection and installation of the valve, the functionality of valves that have been used for long term is deteriorated due to the friction in the sliding parts, cracks at the operating section, wear, damage, and so on. As a result, there are frequent occasions where it develops into a serious breakdown and makes a large impact on the operation of facilities. Since this causes inconvenience to people's lives and leads to time, economic losses, etc, the situation creates the enormous damage. Therefore, the research on new valve structures that can be easily maintained and can reduce the huge budget is urgent.

  2) Existing Status and Problems

In the existing valve, it is highly likely that limited errors can occur due to the over-rotation preventive structure in a deceleration gear that is separated from the valve. In case of open indicator failures in the reduction gear box unit, it is impossible to check the open status of the valve disc. The setting value changes due to the misoperation of the operator and water hammer occurred on the pipeline. Once the setting value is changed, it is very difficult to re-set. When an error occurs in the valve gear box unit in the open status, it is very difficult to take measures without separating the valve in the pipeline.
 
 
   Materials
NO Part names Used material
1 Valve body GCD450 / SSC13 / SSC14 / SSC16
2 Valve disc GCD450 / SSC13 / SSC14 / SSC16
3 Valve shaft STS304 / STS316 / STS316L
4 Seat NR / N.B.R / E.P.D.M / SILICON RUBBER / Etc.
STS 304 / STS316 / STS316L
5 Over-rotation limiting device Ass'y
6 Shaft bearing bush BC6
7 V- Packing N.B.R
8 Grand packing -
9 Gearbox Ass'y
 
  Expected Benefits

  • Economic Effects
    1. Improve the valve's durability
    2. Reduce the valve replacement and repair costs (Budget reduction)
    3. Conservation of water resources with efficient inventory of the valve management
    4. Maintenance costs reduction

  • Industrial Effects
    1. It can reduce the facility operation error due to a malfunction of the valve.
    2. It is possible to operate the equipment stably by improving sealing capacity of the valve.
    3. Since the life cycle of the valve is increased, it can conserve the involved resources and reduce the energy that will be put into the process.

  • Social effects
    1. By the efficient and stable valve management, it reduces the inconvenience caused on overall social activities
       (Vehicle control, traffic chaos, inhibition of smooth flood prevention activities during rainy season flood)
    2. Reduce public complaints by minimizing the suspension time of the water supply during maintenance
    3. Customer Satisfaction by resolving customer complaints

 
  Features

  1. The stopper ring is attached to the shaft and rotates with the shaft. Since the stopper is fixed to the cover, it plays a stopper role by strong supporting force. (Improve the durability by dual support roles)
  2. Since it is installed at the end port of the shaft, the exact status of the disk can be checked.
  3. The maintenance is more convenient in time of emergency since it can be easily assembled and installed.
  4. The safe maintenance is possible since it can be simply fixed to the disc.
* Since the stopper rings are connected to the valve shaft, it is possible to determine the exact position of the disk by attaching the gate graduation to the cover portion as required.

 
 
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