Mud Pump JZR3-L8 Needle Control Valve , Adjustable Needle Valve Haihua F1600

Product Description

Haihua F1600 Mud Pump JZR3-L8 Needle Valve, Mud Pump Spares HH0628.207.013

JZR3-L8 Needle Valve were use in Mud Pump Parts.with connection the pressure gauge.

JZR3-L8 Needle Valve, Mud Pump Spares

JZR3-L8 Needle Valve were use in Mud Pump Parts.with connection the pressure gauge, used in BOMCO Mud pump parts; Such as the F800;F1000;F1300;F1600;F200HL.

An instrument JZR3-L8 needle valve uses a tapered pin to gradually open a space for fine control of flow. The flow can be controlled and regulated with the use of a spindle. 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.

As the screw is turned and the plunger retracted, flow between the seat and the plunger is possible; however, until the plunger is completely retracted, the fluid flow is significantly impeded. Since it takes many turns of the fine-threaded screw to retract the plunger, precise regulation of the flow rate is easily possible.

The virtue of the JZR3-L8 needle valve is from the vernier effect of the ratio between the needle's length and its diameter, or the difference in diameter between needle and seat. A long travel axially (the control input) makes for a very small and precise change radially (affecting the resultant flow).

JZR3-L8 Needle valves may also be used in vacuum systems, when a precise control of gas flow is required, at low pressure,[1] such as when filling gas-filled vacuum tubes, gas lasers and similar devices.

JZR3-L8 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 carburettor.

Note that the float valve of a carburettor (controlling the fuel level within the carburettor) is not a needle valve, although it is commonly described as one. It uses a bluntly conical needle, but it seats against a square-edged seat rather than a matching cone. The intention here is to obtain a well-defined seat between two narrow mating surfaces, giving firm shutoff of the flow from only a light float pressure.

JZR3-L8 Needle valves are also commonly used to provide shut off for the pressure gauge or on applicators to shut off the supply of NH3 to the knives in Anhydrous Ammonia (NH3) applications.

Since flow rates are low and many turns of the valve stem are required to completely open or close, needle valves are not used for simple shutoff applications.

Since the orifice is small and the force advantage of the fine-threaded stem is high, JZR3-L8 needle valves are usually easy to shut off completely, with merely "finger-tight" pressure. The spindle and/or seat of a needle valve, especially one made from brass, are easily damaged by excessive turning force when shutting off the flow.

Small, simple needle valves are often used as bleed valves in water-heating applications.Unlike a ball valve or valves with a rising stem, it is not easy to tell from examining the handle position whether the valve is open or closed.

Mud Pump Parts Model We Can Do

FAQ
1) How can I place order?
A: You can contact us by email about your order details, or place order on line.

2) How can I pay you? 
A: After you confirm our PI, we will request you to pay. T/T is the most usual ways we are using.

3) What's the order procedure?
A: First we discuss order details, production details. Then we issue you an PI for your confirmation. You will be requested to do pr-e paid full payment or deposit before we go into production. After we get the deposit, we start to process the order. We usually need 15-25 days if we don't have the items in stock. Before production has been finished, we will contact you for shipment details, and the balance payment. After payment has been settled, we start to prepare the shipment for you.

4) How do you take care when your clients received defective products?
A: replacement. If there are some defective items, we usually credit to our customer or replace in next shipment.

5) How do you check all the goods in the production line?
A: We have spot inspection and finished product inspection. We check the goods when they go into next step production procedure.

More customer view:58-Fluid Module-yindapump.com.pdf