Accessory Valves
Frequently Asked Questions
Standard Features Common Features: Sequence, Pressure Relief, Pressure Limiting and Pressure Reducing Valves n Material: All cartridge components are steel or stainless steel, operating parts are hardened. n Operating Media: Conventional, petroleum based, premium quality hydraulic fluid such as VektorFlo ® Model No. 65-0010-01 . n Recommended Filtration: 25 Micron (NOM) / 40 Micron (ABS) (minimum). n Adjustments: Turning adjustment screw clockwise (when viewed from adjustment end of cartridge) increases pressure setting on all valve styles.
What is the difference between your Accessory Valves and others I already use? Vektek Accessory Valves are sized for the normal flows and conditions present in hydraulic clamping systems. They are not intended for use in general industrial equipment as they are specifically intended for clamping. Maximum intended flow rate on any Vektek Accessory Valve is 1.5 gpm (unless otherwise noted). Excessive flows may cause damage or erratic behavior. General industrial products are intended for use in large flow applications (typically 2 gpm +). These general industrial products do not normally work well in clamping systems. What is the function of a pressure limiting valve? Relative to a Pressure Relief Valve? Pressure Relief Valves limit the pressure that can pass through the valve. When they reach their preset pressure, they close off to prevent further increase in downstream pressure. Pressure Relief Valves (PRVs) are intended to guard against excess pressure. When a circuit builds beyond the setting of a PRV, it opens and excess pressure is relieved from the system. If a relief valve is set below the pressure switch adjustment of a pump, the pump will kick on and off frequently. Incorrect adjustment of a Pressure Relief Valve can cause expensive damage to your pump. When a group of Sequence Valves is put in series they have to work harder than if they are fed parallel from a single main feed line (see drawing in Section M). Vektek Sequence Valves modulate as fluid passes through them, trying to maintain upstream pressure. The interruption of fluid flow through one valve will adversely effect the modulation of the next valve in line, resulting in erratic performance. You may put as many Explain why you don’t want me to put a group of Sequence Valves in series. Sequence Valves in parallel as you wish. We recommend approximately 500 psi difference in their settings for ease of installation.
What is the difference between your ball valve and the “screw down” valves I can buy locally? Our shutoff Ball Valves close a circuit and maintain that seal until rotated and pressure is released later. They are intended for applications that will not allow for leakage or are repetitive. They change from closed to full open with 1/4 turn of the handle. Vektek offers three styles of filter. The first type is In-line Filter (available in 10 or 25 micron filtration), designed and sized to be used in-line where fine filtration is desired to help protect devices (restricted to a maximum flow rate of 3 gpm) making this unit particularly flexible in meeting your design criteria. You can also mount these filters directly into the device ports of sensitive valves and components to guard against contamination. The second style is the Basic Filter which is also available in 10 and 25-micron filter ratings. These filters catch small debris and are intended Explain why I might select one filter over another. for high contamination systems. The larger filtering surface allows this unit to accept up to 7 gpm and handle larger quantities of chip contamination before maintenance. The frequency of maintenance is determined by the amount of contamination present in your system. Simple flushing will often improve the flow through these filters when performance becomes obviously limited. Our third type of filter element is an In-line Screen Mesh. This filter is intended to catch the big chips (180 micron rating). At fixture assembly, it is easy to forget to clean the I.D. (inside diameter) of the tubing before introducing oil to the plumbing. Tubing and manifold passages may contain chips, dirt, cobwebs, tape or paper. These contaminants will break loose and lodge in a valve resulting in valve failure. By using these “chip catchers” you can reduce expense and can make your system more dependable.
NOTE: Maximum system flow rate is
1.5 gpm (346.5 cu. in. per minute) for all VektorFlo ® special function valves unless otherwise indicated.
Excess flow voids warranty.
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© Vektek, January 2023
800-992-0236
www.vektek.com
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