Needle Valve

Needle valves are usually used in flow-metering applications, especially when a constant, calibrated, low flow rate must be maintained for some time, such as the idle fuel flow in a carburetor. Needle valves sometimes referred to as plunger valves. A needle valve has a relatively small orifice with a long, tapered seat, and a needle-shaped plunger on the end of a screw, which exactly fits the seat. These needle valves are an ideal option for isolating or throttling applications. The self centering, non rotating stem ensures perfect seating. The rigid design gives repetitive bubble tight shut off, easy.s. Our range of needle valves has been designed with durability and performance in the spotlight. These needle valves are available in a variety of sizes (1/4, ½, 1/8 inch). Our range of needle valves has been designed with durability and performance in the spotlight. These needle valves are available in a variety of sizes (1/4, ½, 1/8 inch).

Hitesh Metal is expertise trader & supplier for high quality Steel Needle Valves , which is a pipe attachment detail in which a pipe is inserted into a recessed area of a Valve, fitting or flange. Fatigue resistance is lower than that in butt - welded construction due to the use of fillet welds and abrupt fitting geometry, but it is still better than that of most mechanical joining methods. Stainless Steel Needle Valves offered by Hitesh Metal are used for lines conveying flammable, toxic or expensive material where no leakage can be permitted. Valves are used only in conjunction with ASME Pipe and are available in the same size range. Carbon Steel Needle Valves are used in areas where pipe - work is permanent and are designed to provide good flow characteristics. They are mainly used for small pipe diameters (Small Bore Piping); generally for piping whose nominal diameter is NPS 2 or smaller. Alloy Steel Needle Valves offered by Hitesh Metal is a good choice wherever the benefits of high leakage integrity and great structural strength are important design considerations. To join pipe to Valves and fittings or to other sections of pipe, fillet - type seal welds be used. Duplex Steel Needle Valves are produced to several ASTM standards and are manufactured in accordance with ASME B16.11. Hitesh Metal also offer these Nickel Alloy Needle Valves in different sizes, shapes and designs as per customers specifications at affordable rates. ANSI/ASME B16.10 Needle Valves Specifiactions: Materials CS, SS, Monel, Hastalloy, Duplex and High Nickel alloys Seat Metal or Soft. Connections Thread, Weld or Tube End Design Forged Body with Inline/Straight or Angle Pattern, Integral Bonnet Design Size 1/8 to 1, Custom Sizes available on request End Connection Male and Female NPT, BSPT, Socket Weld (SW) or Dual Ferrule Tube Connections, Male to Female, Female to Female Working Pressure Up to 6000 PSIG, Needle Valves are also available that can handle higher pressure Stainless Steel Needle Valves: up to 6000 psig (414 bar) Steel Needle Valves: up to 3000psig (207 bar) Brass Needle Valves: up to 3000 psig (207 bar) Temperature Rating PTFE 450F,(232C)/ Grafoil 700 F(371C) PTFE Packing: -65 F to 450 F ( -54 C to 232 C) PEEK Packing: -65 F to 600 F ( -54 C to 315 C)

Valves are made from bar stock/forged material and are machined precisely. These valves used to Isolate, Calibrate and Drain the process lines. Range : :1/8" to 1" threaded.1/8"OD to 1"OD, 4mm OD to 25mm OD End connections :NPT/BSPT/BSP MOC :SS 304, SS 316, BRASS, MONEL, HASTALLOY, TEFLON, CS

Brass Needle Valve is used to connect the copper tubing, control the flow of liquids or gas requiring close regulating. Made of brass rods and brass material except for the gland O" rings. Technical Specification: 1. Applicable temperature will be -20 to 100 2. Max Pressure: 1.47Mpa (15kgf/cm2) 3. Recommended for use at less than 80% of max load pressure at temperature between 80 and 100.

Keywords:tognella valves, tognella gauge isolator needle-valves 90°angle, tognella gauge isolator needle-valves in line with lateral 1/2 interface We can supply a wide range of needle valves. Gauge isolator needle-valves in line with lateral 1/2 interface Gauge isolator needle-valves 90°angle Gauge isolator needle-valves 90° angle with lateral 1/2 interface Gauge isolator push button-valves interfaces Gauge isolator push button-valves plate interfaces We also can supply so many other kinds of valves: Tognella control valves, tognella braking valves, tognella check valves, tognella ball valves

Feature: Applicable medium: oil, water,gas and other medium. Pressure: 6000 to 10000PSI Temperature: up to 600 degree centigrade 3-way design has center-off position Flow can switch from single inlet to multiple outlets or multiple inlets to common outlet Material: SS304, 316, 316L carbon steel, brass,alloy Size : 1/8" to 1 1/2" End Connection : NPT, BSPT, ISO, G,R,PT,Socket weld, flanged end Butt weld, Tube fitting and etc. Orifice : 4.0mm Stem packing : PTFE, Grafoil. Screwed bonnet design. Leak tight seal with low operating torque. Rugged bar handle provides positive stem stem actuation Non-rotating and rotating stem tip available All valves are 100% Factory tested Specified specification available upon request OEM offered Packaging : Carton or wooden case or upon request

For the valve hole accuracy 1 m hydraulic needle valve, although AAK is 20% more expensive, its service life is twice that of its peers At the beginning of this year, Samuel asked by email about the production time of 1,000 hydraulic needle valves, He specially emphasized that the technical parameters of the hydraulic needle valves need to be the same as those samples made before, especially the valve hole accuracy must be 100% within 1 m or less. Samuel has been cooperating with AAK for 3 years. It is the first time that he deliberately emphasized as such in email. After communication, I learned that the hydraulic needle valves that AAK made samples for last time was 20% higher than that of other hydraulic valve manufacturers, so he placed the order with another manufacturer. However, now this batch of hydraulic needle valves have been complained by customers that the hydraulic winch is stuck. The root cause is that the accuracy of the hydraulic needle valve holes is uneven, and some are less than 1 m, and some higher than 1 m. After the original hydraulic needle valves were replaced by the manufacturer, complaints still continued. The boss was very dissatisfied with Samuel's purchase this time and asked him to source another hydraulic needle valve supplier. Samuel can only get back to AAK, because the sample accuracy of AAK hydraulic needle valve hole was 1 m or less. I told Samuel that the shipment of AAK hydraulic needle valves has never been lower than the sample standard. The next day, Samuel sent us the PO of 1,000 hydraulic needle valves. After 45 days, AAK delivered 1,000 hydraulic needle valves. Last week, Samuel sent an email saying that AAK hydraulic needle valves had been installed on the equipment for more than half a year, and no complaint was received. His boss would rather spend 20% more cost and must purchase the hydraulic needle valves with valve hole accuracy 1 m for 100%. I told him that even if AAK hydraulic needle valve is used properly in another year, it will not get stuck. Samuel was surprised at how AAK ensured 100% accuracy of the hydraulic needle valve hole within 1 m? For the control of the manufacturing quality of hydraulic needle valves, AAK's 3 characteristics lead the majority of hydraulic valve manufacturers. 1. On the processing equipment, the valve hole is finished with the TAMIX one-time tool walking high-speed ultra precision honing mill imported from Japan, which is thoroughly ground without traces. In mass production, the wear-resistant SPA tool effectively ensures the stability of processing, and the valve hole accuracy is guaranteed to be 0.8-1.0 m and the surface roughness reaches Ra0.2-0.3. 2. In the processing process, AAK has more than 10 years of experienced technicians with special machines and special personnel, who have engraved the dimensional accuracy of each element in their minds.

Carter comes from an manufacturing company in , and the purchase of hydraulic needle valves has been smooth in recent years. At the beginning of last year, an excavator sold by their company for less than 6 months was complained by customer. The boom of the excavator falls too fast due to its own weight, which is easy to cause danger. Their technician found that there was a problem with the hydraulic needle valve of the hydraulic system. There were obvious wear marks at the contact point between the valve spool and valve seat of the hydraulic needle valve, which was easy to leak. The leakage of the hydraulic needle valve will cause the oil saving and speed limiting circuit of the hydraulic cylinder to be uncontrollable. The boss was very angry that the equipment sold for only half a year was complained and asked Carter to find out the cause of the hydraulic needle valve problem and solve it. Carter contacted the original manufacturer of the hydraulic needle valves and requested to replace the hydraulic needle valves. The manufacturer said that the service life of hydraulic needle valves under 450bar working condition is basically 6 months. The only way to solve this complaint is to replace the hydraulic needle valves every 6 months. Such reply made Carter speechless, because his customer would not accept the high-frequency replacement of hydraulic needle valves, which not only brought a bad user experience, but also the after-sales cost was not cheap. Carter contacted all of his hydraulic needle valve suppliers, and they all replied that they were not sure to achieve a hydraulic needle valve with a service life of 1 year under the working condition of 450bar. When browsing the website, he found and left a message on the How long is the service life of hydraulic needle valves with pressure resistance of 450bar We replied directly for 1 year or more. The next day, he told the problems encountered in purchasing hydraulic needle valves at the beginning of last year in detail. After receiving the drawing of the hydraulic needle valve, we found that the hydraulic needle valve needed by Carter has much higher requirements than the ordinary hydraulic needle valves. We replied that will select specific materials for samples, which can ensure that the hydraulic needle valves can be used for more than 1 year under normal conditions. If possible, he can directly test the samples.