Needle valve is a kind of globe valve , it has the characteristics of globe valve , and also have its own characteristics , for example, the needle valve can adjust the flow rate of the medium precisely , and the top of the stem is a needle , so it is called needle valve .
What is the needle valve ?
Needle valve is a kind of globe valve , it has the characteristics of globe valve , and also have its own characteristics , for example, the needle valve can adjust the flow rate of the medium precisely , and the top of the stem is a needle , so it is called needle valve .
Needle valve specification
| Product Name | Double ferrules needle valve |
| Part No. | HY-FNV-1 |
| Material | SS304, SS316 |
| Size Range | 1/8” to 1” |
| Working pressure | 1000 psi |
| Working temperature | -54 degree C to 649 degree C |
| Connection Type | Double ferrules |
| Certificate | ISO9001:2015 , material test certificate |
| MOQ | 20 pcs |
| Sample available | Yes, sample is free |
| Applicable Medium | Oil, gas, water, acid liquid and so on |
Main material sheet
| Item | Part Name | Material |
| 1 | Body | SS304, SS316 |
| 2 | Bonnet Gasket | PTFE, RPTFE, VITON, Graphite |
| 3 | Bonnet | SS304 , SS316 |
| 4 | Packing Seat | PTFE, Graphite |
| 5 | Packing | PTFE, Graphite |
| 6 | Packing Gland | SS304, SS316 |
| 7 | Stem | SS304, SS316 |
| 8 | Handle | SS304, SS316 |
| 9 | Handle nut | SS304, SS316 |
Product Characteristics
1.A dust-proof cap is supplied on the top of the stuffing box gland which can protect the stem thread from the outside impurities.
2.The stuffing filling is under the thread to effectively protect the lubricating grease from being brushed away.
3.The core and the stem is of lapped joint with the functions of up sealing.
4.Vertical hard sealing is used between the core and the body, also between the seat and the body.
5.Non-rotational ball-shaped stem head and adjustable stem head can be supplied.
6.Operating pressure can be up to 10000 psi (689bar).
7.Operating temperature: -53 to 232℃（-65 to 450 F）for PTFE sealing. -53 to 649℃（-65 to 1200 F ）for graphite sealing.
Advantages
1.The needle valve has the advantages of easy installation and disassembly, connection and fastening, conducive to fire prevention, explosion-proof and high pressure resistance, good sealing performance, etc., and is an advanced connection method valve in power stations, oil refining, chemical installations and instrument measurement pipelines.
2.The needle valve has good sealing and long service life, even if the sealing surface is damaged, it only needs to replace the vulnerable parts and can continue to be used. When installing the needle valve, the flow direction of the medium should be consistent with the direction of the arrow on the valve body. Manual globe valves and ball valves can be installed anywhere in the pipeline.
2.Needle valve is a kind of valve that can be adjusted widely used, such as the cutting distance for flame cutting, the knob to adjust the flame temperature is a needle valve, the instrument needle valve is an important part of the instrument measurement pipeline system, mainly has a globe valve and ball valve, its function is to open or cut off the pipeline passage.
Wenzhou Huiyi Valve and Fittings Co.,Ltd is a manufacturer for pipe fittings and valves in Wenzhou , we have 20 years’ experience in pipe fittings and valves field , we mainly produce these products: ball valve , needle valve , check valve , globe valve, gate valve , butterfly valve , compression fittings, forged steel pipe fittings, casting steel pipe fittings, butt weld pipe fittings and so on . Our company passed the ISO9001:2015 management system, the products can be made as per ASME, ANSI, DIN, GB, Europe standard and non-standard products as per customers’ drawing and samples, 90% of our products are exported to all over the world.
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