The ultra-high pressure needle valve is an important part of the instrument measurement pipeline system, mainly including the stop valve and ball valve, whose function is to open or cut off the pipeline passage. The valve core of needle valve is a very sharp cone, which is inserted into the valve seat like a needle, hence the name. Needle valve has the advantages of convenient installation and disassembly, tight connection, fire protection, explosion-proof, high pressure resistance, good sealing performance, etc. It is an advanced connection mode valve in power plants, oil refining, chemical plants and instrument measurement pipelines. The needle valve has good sealing performance and long service life. Even if the sealing surface is damaged, it only needs to replace vulnerable parts to continue to use.
Selection principle of ultra-high pressure needle valve:
1. Low temperature needle valve with valve cover should be selected for pipeline system and device of low temperature medium.
2. On the pipeline system of the catalytic cracking unit of the oil refining unit, the lifting rod needle valve can be selected.
3. All stainless steel needle valves made of austenitic stainless steel with PTFE as the seat sealing ring should be selected for devices and pipeline systems with corrosive media such as acid and alkali in the chemical system.
4. Metal sealed needle valves can be selected for pipeline systems or devices of high-temperature medium in metallurgical systems, power systems, petrochemical plants and urban heating systems.
7. The needle valve connected by welding shall be selected for the transmission pipeline and storage equipment of product oil.
8. On the pipelines of urban gas and natural gas, needle valves with flange connection and internal thread connection are selected.
9. In the oxygen pipeline system, strict degreasing treatment is required.
Precautions for installation of ultra-high pressure needle valve:
1. The installation position, height and inlet and outlet directions must meet the design requirements. Note that the flow direction of the medium should be consistent with the arrow direction marked on the valve body, and the connection should be firm and tight.
2. The appearance inspection must be carried out before the installation of the valve, and the nameplate of the valve shall comply with the provisions of the current national standards.
3. For valves with working pressure greater than 32.0 MPa and which can cut off the main pipe, strength and tightness tests shall be carried out before installation, and they can only be used after being qualified.
4. During the strength test, the test pressure shall be 1.5 times of the nominal pressure, and the duration shall not be less than 5min. The valve shell and packing shall be qualified if there is no leakage.
5. During the leak test, the test pressure is 1.1 times of the nominal pressure; The duration of the test shall comply with the provisions of national standards.
Introduction to stainless steel needle valve
The stainless steel needle valve is an important part of the instrument measurement pipeline system, mainly including the stop valve and ball valve, whose function is to open or cut off the pipeline passage. The valve core of needle valve is a very sharp cone, which is inserted into the valve seat like a needle, hence the name. Needle valve has the advantages of convenient installation and disassembly, tight connection, fire protection, explosion-proof, high pressure resistance, good sealing performance, etc. It is an advanced connection mode valve in power plants, oil refining, chemical plants and instrument measurement pipelines. The needle valve has good sealing performance and long service life. Even if the sealing surface is damaged, it only needs to replace vulnerable parts to continue to use.
Selection principle of stainless steel needle valve:
1. Low temperature needle valve with valve cover should be selected for pipeline system and device of low temperature medium.
2. On the pipeline system of the catalytic cracking unit of the oil refining unit, the lifting rod needle valve can be selected.
3. All stainless steel needle valves made of austenitic stainless steel with PTFE as the seat sealing ring should be selected for devices and pipeline systems with corrosive media such as acid and alkali in the chemical system.
4. Metal sealed needle valves can be selected for pipeline systems or devices of high-temperature medium in metallurgical systems, power systems, petrochemical plants and urban heating systems.
7. The needle valve connected by welding shall be selected for the transmission pipeline and storage equipment of product oil.
8. On the pipelines of urban gas and natural gas, needle valves with flange connection and internal thread connection are selected.
9. In the oxygen pipeline system, strict degreasing treatment is required.
Precautions for installation of stainless steel needle valve:
1. The installation position, height and inlet and outlet directions must meet the design requirements. Note that the flow direction of the medium should be consistent with the arrow direction marked on the valve body, and the connection should be firm and tight.
2. The appearance inspection must be carried out before the installation of the valve, and the nameplate of the valve shall comply with the provisions of the current national standards.
3. For valves with working pressure greater than 32.0 MPa and which can cut off the main pipe, strength and tightness tests shall be carried out before installation, and they can only be used after being qualified.
4. During the strength test, the test pressure shall be 1.5 times of the nominal pressure, and the duration shall not be less than 5min. The valve shell and packing shall be qualified if there is no leakage.
5. During the leak test, the test pressure is 1.1 times of the nominal pressure; The duration of the test shall comply with the provisions of national standards.
Introduction to needle valve of pressure gauge
JJM1 and JJM8 pressure gauge needle valves are important components of the instrument measurement pipeline system, mainly including stop valves and ball valves, which are used to open or cut off the pipeline access. The valve core of needle valve is a very sharp cone, which is inserted into the valve seat like a needle, hence the name. Needle valve has the advantages of convenient installation and disassembly, tight connection, fire protection, explosion-proof, high pressure resistance, good sealing performance, etc. It is an advanced connection mode valve in power plants, oil refining, chemical plants and instrument measurement pipelines. The needle valve has good sealing performance and long service life. Even if the sealing surface is damaged, it only needs to replace vulnerable parts to continue to use.
Introduction to ferrule needle valve
J91W ferrule needle valve is an important part of the instrument measurement pipeline system, mainly including stop valve and ball valve, which is used to open or cut off the pipeline. The valve core of needle valve is a very sharp cone, which is inserted into the valve seat like a needle, hence the name. Needle valve has the advantages of convenient installation and disassembly, tight connection, fire protection, explosion-proof, high pressure resistance, good sealing performance, etc. It is an advanced connection mode valve in power plants, oil refining, chemical plants and instrument measurement pipelines. The needle valve has good sealing performance and long service life. Even if the sealing surface is damaged, it only needs to replace vulnerable parts to continue to use.
Product Features of J91W Ferrule Needle Valve
1. Manufacturing standard: GB/T12224-2005 JB/T7747-1995
2. Connection type: ferrule type
3. Structural features: cone seal, movable valve disc
4. Valve inspection and test: GB/T13927-1992
5. Nominal pressure: ≤ 10000Psi
6. Applicable working temperature: - 40 ℃~+350 ℃
7. Applicable media: corrosive and non corrosive media such as water, oil and gas
8. Nominal diameter: DN6, DN10, DN15, DN20, DN25
Introduction to welding needle valve
J61Y welding needle valve is an important part of instrument measurement pipeline system, mainly including stop valve and ball valve, whose function is to open or cut off pipeline access. The valve core of needle valve is a very sharp cone, which is inserted into the valve seat like a needle, hence the name. Needle valve has the advantages of convenient installation and disassembly, tight connection, fire protection, explosion-proof, high pressure resistance, good sealing performance, etc. It is an advanced connection mode valve in power plants, oil refining, chemical plants and instrument measurement pipelines. The needle valve has good sealing performance and long service life. Even if the sealing surface is damaged, it only needs to replace vulnerable parts to continue to use.
Design and manufacture: GB/T12223-89
Welding size: JB/T 1751-75
Structure length: GB12221
Inspection and experiment: GB/T13927
Introduction of angle needle valve
J24H/W angle needle valve is an important part of instrument measurement pipeline system, mainly including stop valve and ball valve, whose function is to open or cut off pipeline access. The valve core of needle valve is a very sharp cone, which is inserted into the valve seat like a needle, hence the name. Needle valve has the advantages of convenient installation and disassembly, tight connection, fire protection, explosion-proof, high pressure resistance, good sealing performance, etc. It is an advanced connection mode valve in power plants, oil refining, chemical plants and instrument measurement pipelines. The needle valve has good sealing performance and long service life. Even if the sealing surface is damaged, it only needs to replace vulnerable parts to continue to use.
Introduction to external thread needle valve
J21W and J23W external thread needle valves are important components of the instrument measurement pipeline system, mainly including stop valves and ball valves, which are used to open or cut off the pipeline access. The valve core of needle valve is a very sharp cone, which is inserted into the valve seat like a needle, hence the name. Needle valve has the advantages of convenient installation and disassembly, tight connection, fire protection, explosion-proof, high pressure resistance, good sealing performance, etc. It is an advanced connection mode valve in power plants, oil refining, chemical plants and instrument measurement pipelines. The needle valve has good sealing performance and long service life. Even if the sealing surface is damaged, it only needs to replace vulnerable parts to continue to use.
Introduction to internal thread needle valve
J11W and J13W internal thread needle valves are important components of the instrument measurement pipeline system, mainly including stop valves and ball valves, which are used to open or cut off the pipeline access. The valve core of needle valve is a very sharp cone, which is inserted into the valve seat like a needle, hence the name. Needle valve has the advantages of convenient installation and disassembly, tight connection, fire protection, explosion-proof, high pressure resistance, good sealing performance, etc. It is an advanced connection mode valve in power plants, oil refining, chemical plants and instrument measurement pipelines. The needle valve has good sealing performance and long service life. Even if the sealing surface is damaged, it only needs to replace vulnerable parts to continue to use.
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