Zawory iglicowe

Needle valves offer economical solutions for applications that require basic adjustable control of hydraulic flow. The effective orifice size inside the valve is varied with screw or knob adjustments and the valve can be made tamper resistant with the addition of an optional cap. Shutoff can be achieved when the valve is adjusted completely closed. Once the adjustment is set, the valve acts as a fixed orifice. Like all fixed orifices, any changes in pressure will cause changes in flow. If constant flow is required regardless of system or load pressure, please consider Parker’s pressure compensated flow controls.

Parker’s J02A2, NVH081, NVH101, and J06A2 cartridges are basic 2-port needle valves with fine adjustment options available. The orifice will meter in both directions, but flow from port 2 to 1 is preferred. If unrestricted reverse flow is required, an additional check valve will need to be used with these needle valve versions.

Parker also offers J02B2, FV101, and FV102 needle valves with internal reverse free flow checks in order to reduce manifold size and component quantities. Typical applications and industries include Accumulator Bleed-off, Motor Speed Control, Cylinder Speed Control, Bleed-Off Flow, Power Units, Oil and Gas, Material Handling, Construction, Drills, Presses, Mixers, Agriculture, Balers, Combines, etc.

Series MVI cartridge-type needle valves are designed for installation in a precision-machined cavity made in the manifold of the machine.

These valves provide precise metering control and full shutoff of flow. An o-ring and backup ring installed on the cartridge fully isolate the inlet and outlet ports of the machined cavity from each other.

The exclusive “Colorflow” color-band reference scale on the valve stem is a great convenience and time-saver in setting the valve originally and in returning it to any previous setting.

As part of the Colorflow Family, Parker MV Series Needle Valves have color rings that provide an accurate visual indication of valve adjustment. The MV Series needle valve comes in 3 adjustment options, standard, fine and micro-fine. The valve is available in an in-line or right angle style.

The MV Series Needle valve is available in 7 sizes from 1/8” to 1”. Port options include NPT and SAE. Right angle valve option is available with male or female NPT ports. Material offerings are brass and steel. The steel version comes standard with black oxide finish. It can be ordered with optional panel mount kits.
The MV Needle Valves can be found in numerous pneumatic, hydraulic or water applications including:

• Food processing
• Construction equipment
• Factory automation
• Power units
• Plastic molding
• Material handling
• Oil & Gas
• Die cast
• Machine tools
• Car washes
• Paper mills
• Marine

Zawór serii N firmy Parker to dwustopniowy zawór iglicowy, która umożliwia dokładne nastawienie przy niskim przepływie w zakresie pierwszych trzech obrotów pokrętłem regulacyjnym. Po następnych trzech obrotach zawór zostanie otwarty z pełnym przepływem, a w obrębie tych obrotów możliwe jest standardowe ustawienie dławienia.

Rynki:
• Automatyka przemysłowa
• Obrabiarki
• Przemysł morski
• Transport materiałów
• Górnictwo
• Przemysł
• Produkcja
• Formowanie
• Przemysł naftowy i gazowy
• Wytwarzanie energii elektrycznej
• Fabryki pojazdów

Cechy/zalety:
• Dostępna opcja odporna na ingerencję
• Śruba ustalająca blokuje zawór w żądanym ustawieniu
• Dostępnych jest osiem rozmiarów przyłączy od 1/8 do 1 1/4 cala.
• Oferowane materiały to mosiądz, stal i stal nierdzewna
• Opcje przyłączy obejmują ISO 6149, NPT, BSPP, BSPT i SAE
• Wyjątkowy kolorowy pasek „Colorflow" zapewnia dokładne wizualne wskazanie nastawy.

Zastosowania:
• Nadaje się do ogólnych zastosowań hydraulicznych

Parker’s NS series needle valve allows fine tuning at low flow with the first three turns of the adjusting knob, with full-open flow plus conventional precision throttling with the final three turns of the knob.

Markets
• Factory Automation
• Machine Tools
• Marine
• Material Handling
• Mining
• Miscellaneous Industrial
• Miscellaneous Manufacturing
• Molding
• Oil &Gas
• Power Generation
• Vehicle Assembly Facilities

Features/Benefits
• Tamperproof option available
• Set screw locks the valve on a desired setting
• Port sizes available in 5 sizes from 1/4” to 1”
• The exclusive “Colorflow” color-band provide an accurate visual indication of setting

Applications
• Suitable for general hydraulic applications

Needle valves create a means of controlling the flow of liquids or gases through the valve mechanism. It is possible to easily adjust the flow rate to any specific amount desired, making the needle valve useful in a number of applications. Parker's all brass needle valves have metal-to-metal seats with fine thread screwdown making them ideal for situations in which the desired flow must be maintained with little to no variance. By controlling the needle valve rate, stress on the delivery system is kept to a minimum. The specialty formulated low temperature seal in the Parker needle valve remains elastic to temperatures as low as -40?F.
Parker's needle valves should always be installed with the pressure against the seat.

Markets
• Industrial
• Pneumatic
• MRO
• Packaging
• Water

Features/Benefits:
• Accurate flow control
• Corrosion resistance
• Forged brass for improved long-term mechanical strength
• Metal-to-metal seal for positive sealing
• Low temperature seal for improved performance

Applications:
• Pneumatic control lines
• Water circuits
• Machine tools
• Textile

Custom configurations and sizes are available upon request. Contact Parker Fluid System Connectors Division at (269) 692-6555 or fscsales@parker.com for additional information.