DJT Desuperheating Water Regulating Valve

DJT desuperheating water regulating valve is a multi-stage throttling regulating valve for preventing cavitation, also called high pressure differential regulating valve, which is a regulating valve with novel structure. This valve can be used for large and medium-sized thermal power generating units to control the flow of desuperheating water required for the temperature of boiler main steam and reheat steam. It is one of the key regulating valves in power plants.
The valve internal component structure of DJT desuperheating water regulating valve is a cascade structure. The fluid passes through a tortuous channel, which can consume a lot of energy, reduce the flow rate and prevent cavitation. Valves with a nominal diameter of more than 40mm adopt a high-pressure self-sealing structure.

※ Technical Parameters
Valve body
Type: forged angle, flat valve body or staggered valve body
Nominal diameter: DN25, DN32, DN40, DN50
Nominal pressure: ANSI 1500, ANSI2500 or PN25MPa, PN32MPa
Connection: BW welding (or as required by the user)
Material: 20# forged steel
Upper valve cover
Normal temperature type ≤420℃
Remarks: The working temperature must not exceed the allowable range of various materials.
Gland type: bolt clamping type
Packing: graphite plus Inconel wire braided packing
Components inside the valve
Valve core type: anti-cavitation cascade throttle valve core
Flow characteristics: approximate equal percentage characteristics. The characteristic curve is shown in the figure below:

Media flow direction: high inlet and low outlet
Material: stainless steel nitriding hardening treatment
Performance
Allowable pressure difference: 25M pa
Leakage: in accordance with ANSI B16.104-1976 IV level
Actuator
Equipped with electric actuator (electric opening or electric closing)
(Note: This valve can also be equipped with pneumatic diaphragm actuator or cylinder piston actuator)

※ Main Parts Materials
     

※ Kv Value and Stroke    

※ FAQ

What are the installation requirements for control valves?
The valve should be installed at the appropriate position of the pipeline to ensure that the flow direction is consistent with the direction indicated by the valve body; secondly, check whether the valve and its accessories are intact before installation to ensure that there is no damage; during installation, ensure that the pipeline connection is stable to avoid stress concentration and prevent damage to the valve; in addition, sufficient space should be provided for the valve to facilitate adjustment, inspection and maintenance; finally, the valve should be protected from excessive vibration or temperature, especially under high pressure and high temperature environments.

What are the common applications of temperature and pressure reducers?
Temperature and pressure reducers are widely used in many fields. They are mainly used in steam systems to reduce high-pressure steam to appropriate pressure to ensure safe operation of equipment. They are commonly used in power, fertilizer, food processing and other industries. They are also used in oil and gas pipelines, chemical production, pharmaceutical plants, etc. to ensure stable pipeline pressure and avoid system overpressure or excessive temperature. In addition, reducers are also used in HVAC, metallurgy and other industries to adjust the temperature and pressure of the fluid in the system to ensure the smooth progress of the process.

How to maintain medium and high pressure valves?
When maintaining medium and high pressure valves, first check the wear of key components such as valve body, valve seat, sealing ring and valve stem regularly. Clean the valve to prevent impurities from blocking and affecting operation. Check the operating performance of the valve to ensure flexible opening and closing without sticking. Check the sealing to prevent leakage and replace the seals if necessary. For valves that operate at high pressure for a long time, it is recommended to perform functional tests regularly to ensure their reliability under high pressure environment. In addition, check the connection parts of the valve to avoid looseness or leakage caused by vibration or corrosion.

※ Industry Applications

※ Company Introduction

Jiangsu Gaote Valve Industry Co., Ltd. was established in 2003. The company is a medium-sized enterprise specializing in the production of various petrochemical and power station valve series. The main products include high-temperature and high-pressure power station valves, gate valves, stop valves, ball valves, check valves, butterfly valves, instrument valves, needle valves, regulating valves and non-standard special valves for power stations, etc. Hundreds of varieties and specifications of valves, products are widely used in power, petrochemical, metallurgy, pharmaceutical, mining, steel, mining, water supply and drainage and other industries. The company's R&D team actively explores the field of valves and explores a path of industrial upgrading from ordinary valves to valves.

Jiangsu Gaote Valve Industry Co., Ltd. is an innovative demonstration enterprise of small and medium-sized enterprises in Jiangsu Province. It is located in the Economic Development Zone of Funing County, Jiangsu Province, and National Highway 204 passes through the territory. The company has passed the ISO9001 quality system certification and the special equipment manufacturing license of the People's Republic of China. It is a member unit of the power station accessories supply of the State Power Corporation, a member unit of the Sinopec Equipment Resources Market, and a member unit of the first-level supply network of China National Petroleum Corporation. It has gradually established a good reputation in power station valves. The company has an advanced management mechanism, with fixed assets of more than 30 million yuan, more than 100 sets of sophisticated mechanical processing equipment and inspection and testing equipment, and more than 10 technical R&D personnel, forming an integrated production, sales and service.