Send Message

TOBO STEEL GROUP CHINA

Home ProductsSteel Needle Valve

AISI 316 300 Bar Steel Needle Valve 3/8" DIN ISO ASTM 351 Gr. CF8M Body

AISI 316 300 Bar Steel Needle Valve 3/8" DIN ISO ASTM 351 Gr. CF8M Body

  • AISI 316 300 Bar Steel Needle Valve 3/8" DIN ISO ASTM 351 Gr. CF8M Body
  • AISI 316 300 Bar Steel Needle Valve 3/8" DIN ISO ASTM 351 Gr. CF8M Body
  • AISI 316 300 Bar Steel Needle Valve 3/8" DIN ISO ASTM 351 Gr. CF8M Body
AISI 316 300 Bar Steel Needle Valve 3/8" DIN ISO ASTM 351 Gr. CF8M Body
Product Details:
Place of Origin: China
Brand Name: TOBO
Certification: ISO
Model Number: /
Payment & Shipping Terms:
Minimum Order Quantity: 5Pcs
Price: Negotiation
Packaging Details: Carton, Ply-Wooden case or according to the clients request
Delivery Time: 10 working days
Payment Terms: L/C, T/T, Western Union
Supply Ability: 1000Pcs per Month
Contact Now
Detailed Product Description
Production Name: SS316 Needle Valve Material: SS316
Size: 3/8'' AVAILABLE SIZE:: 1/4"-1"
Class: 3000PSI Types: Flanged Valve
Ends: MALE X FEMALE THREADED END Application: Gas,Oil,Water And Other Corrosie Liquid
High Light:

AISI 316 Steel Needle Valve

,

CF8M Steel Needle Valve

,

CF8M Flanged Needle Valve

AISI 316 300 Bar 3/8" DIN ISO Stainless Steel Needle Valve

 

Needle valves:

 

A needle valve is a type of valve with a small port and a threaded, needle-shaped plunger. It allows precise regulation of flow, although it is generally only capable of relatively low flow rates.

 

Body ASTM 351 Gr. CF8M
Packing
Stem 316 SS
Handle 304 SS
Maximum pressure 3000 psi

 

Needle Valve Work:

 

Needle valves open and close an orifice with a tapered end that raises and lowers with the spin of a handle. Figure 2 shows a needle valve cross sectional view, design, and components. The handle (A) is connected to the plunger, also called a stem (F). When you turn the handle, the plunger moves up or down based on the threads (C). The locking nut (B) prevents it from fully unscrewing. As the plunger moves down, the tapered pointed end (I) comes into contact with the valve seat to fully seal the orifice (H). Often, the valve seat is also tapered. There are various options and sizes available to connect it to a pipe or hose through the port connection (G) on the input and output. The bonnet (D) is connected to the valve housing (E), which can be made out of different materials like brass or stainless steel.

AISI 316 300 Bar Steel Needle Valve 3/8" DIN ISO ASTM 351 Gr. CF8M Body 0

Based on the threads, you can very precisely locate the plunger’s tapered end away from the valve seat to accurately control the flow rate. Therefore, by varying the plunger location you will control the flow rate between maximum and zero.

Different types of needle valves:

A manually operated threaded needle valve (described above) is the most common type of needle valve. However, two additional variants are: motorized and angle.

  • Motorized Needle Valve: These needle valves don’t have a handle for manual operation, but instead use an electric or pneumatic actuator to connect to and turn the plunger. These can be remotely controlled, used in a closed loop system, and/or put on a timer to accurately control the flow rate remotely.
  • Angle Needle Valve: These needle valves turn the output from the inlet by 90 degrees instead of in-line. The same operation concept applies, but the 90-degree angle can allow for better system integration. Figure 3 shows an example of an angle needle valve.

AISI 316 300 Bar Steel Needle Valve 3/8" DIN ISO ASTM 351 Gr. CF8M Body 1AISI 316 300 Bar Steel Needle Valve 3/8" DIN ISO ASTM 351 Gr. CF8M Body 2

Needle valve selection:

 

When selecting a needle valve, four main characteristics and/or application requirements need to be taken into account: material, pressure, size, and temperature.

Material

The needle valve's housing material (Figure 2 callout E) is specified according to the application. The most common valve housing materials are brass and stainless steel due to their range of chemical resistance, however, there are also other materials available for special applications.

 

Needle Valve Applications:

Most constant pressure pump governors have needle valves to minimize the effects of fluctuations in pump discharge pressure. Needle valves are also used in some components of automatic combustion control systems where very precise flow regulation is necessary.

Needle Valve Body Designs

 

One type of body design for a needle valve is the bar stock body. Bar stock bodies are common, and, in globe types, a ball swiveling in the stem provides the necessary rotation for seating without damage.

 

AISI 316 300 Bar Steel Needle Valve 3/8" DIN ISO ASTM 351 Gr. CF8M Body 3

Needle valves are frequently used as metering valves. Metering valves are used for extremely fine flow control. The thin disk or orifice allows for linear flow characteristics. Therefore, the number of handwheel turns can be directly correlated to the amount of flow. A typical metering valve has a stem with 40 threads per inch.

Needle valves generally use one of two styles of stem packing: an O-ring with TFE backing rings or a TFE packing cylinder. Needle valves are often equipped with replaceable seats for ease of maintenance.

Contact Details
TOBO STEEL GROUP CHINA

Contact Person: Amy

Send your inquiry directly to us
Other Products