Pilotaje para cerrar, spring-biased closed, disco desequilibrado elemento lógico con muescas de medición y indicador de posición
These unbalanced, pilot-to-close logic valves are 2-way switching elements that are spring biased closed. Pressure at either work port 1 or 2 will oppose the spring and tend to open the valve while pressure at port 3 will tend to close it. The force generated by the pressure at port 3, plus the spring force, must be greater than the sum of the forces generated by the pressures at ports 1 and 2 for the valve to remain closed.
This valve incorporates a position switch to provide confirmation that the valve is closed.
- This valve has metering notches in the poppet to reduce hydraulic shock during valve opening and closing.
- The position switch in this valve provides confirmation that the valve is closed.
- These valves have positive seals between port 2 and the pilot area.
- This cartridge is supplied as a sealed, factory set unit and is not field serviceable. Any tampering will violate the product warranty.
- When torquing this cartridge into its cavity, a crow's foot wrench or similar will be required since the position switch precludes the use of a deep socket wrench.
- Because these valves are unbalanced, operation is pressure dependent. Opening and closing of the poppet are functions of the force balances on three areas: Port 1 = 100%, Port 2 = 80%, and the Pilot Area = 180%.
- These valves are pressure responsive at all ports, therefore it is essential to consider all aspects of system operation through a complete cycle. Pressure changes at any one port may cause a valve to switch from a closed to an open position, or vice versa. All possible pressure changes in the complete circuit must be considered to assure a safe, functional system design.
- All ports will accept 5000 psi (350 bar).
- Position switch is CE approved.
- An optional protective cover, with mounting hardware included, may be ordered separately. See kit number: 991-043.
- Incorporates the Sun floating style construction to minimize the possibility of internal parts binding due to excessive installation torque and/or cavity/cartridge machining variations.
|Capacity||40 gpm160 L/min.|
|Maximum Operating Pressure||5000 psi350 bar|
|Maximum Valve Leakage at 110 SUS (24 cSt)||1 drops/min.0,07 cc/min.|
|Pilot Volume Displacement||.25 in³4,1 cc|
|Pilot Passage into Valve||.06 in.1,50 mm|
|Area Ratio, A3 to A1||1.8:11.8:1|
|Area Ratio, A3 to A2||2.25:12.25:1|
|Transition leakage at 110 SUS (24 cSt)||2 in³/min.@1000 psi30 cc/min.@70 bar|
|Valve Hex Size||1 1/4 in.31,8 mm|
|Valve Installation Torque||150 - 160 lbf ft203 - 217 Nm|
|Seal kit - Cartridge||Buna: 990017007|
|Seal kit - Cartridge||Polyurethane: 990017002|
|Seal kit - Cartridge||Viton: 990017006|
|Supply Voltage||20-30 VDC20-30 VDC|
|Operating Temperature Range||-25 to 80 °C-25 to 80 °C|
|Vibration||≥ 50g, 0-500 impulses/sec≥ 50g, 0-500 impulses/sec|
|Shock||>50 g, 1ms>50 g, 1ms|
|Reverse Polarity Protection||YesYes|
|Maximum Output Load||≤ 400 mA, Duty Ratio 100%≤ 400 mA, Duty Ratio 100%|
|Short Circuit Protection||Yes, Load Short UnlimitedYes, Load Short Unlimited|
|Turn On Time||≤ 25 ms≤ 25 ms|
|Hysteresis||≤ .002 in.≤ .002 in.|
|Thermal Shift - 0 to 80 °C ≤ ±||.004 in.0,1 mm|
|EMC||DIN EN 61000-6-1/2/3/4DIN EN 61000-6-1/2/3/4|
|conector||M12 X 1 (4) PinM12 X 1 (4) Pin|
|Connector Environment Rating||IP65IP65|
Direct-acting valves are used to prevent over pressure, and pilot-operated valves are used to regulate pressure. If you are unsure, use a direct-acting valve. Sun's direct acting valves are very fast, dirt tolerant, stable, and robust. Sun's pilot-operated valves are moderately fast, they have a low pressure rise vs. flow curve, and they are easy to adjust.
Because of the very high ratio, the COFO has limited capacity. The discharge path is across a .050 inch (1,3 mm) diameter orifice. If you have large accumulators combined with low precharge pressures, this may not discharge the energy quickly enough. Using the COFO XDN cartridge in conjunction with an LODA XDN will provide capacity for larger applications.
There are exactly 250 Sun drops in a cubic inch or 15 in a cc.
- Válvulas y bobinas a solenoides de la serie Sun FLeX
- Logic Element Cartridges Technical Tips
- Series 4 PLUS Cartridges Offer Higher Flows with Lower Pressure Losses
- Sun Offers Zinc-Nickel Plating for Corrosion Resistance
- More Options for Logic Elements with Position-Indicating Switch
- Nuevas válvulas direccionales accionadas por solenoide de la serie FLeX
- Sun Cartridges with EPDM Seals
- QuickDesign con SmartConnect Ofrece una Herramienta para Construir Esquemáticos
- Take the Guesswork Out of Logic Circuits
- Reduce el impacto de descompresión y sus costos de operación
- Pilot Controlled Directional Cartridges Technical Tips
- Válvulas CavitySaver de multifunción ofrecen varias soluciones en una
- Sun Expands Corrosion-Resistant Solutions
- Manufacturing Sun Cartridge Cavities (522.27 KB)
- Sun's Floating Style Screw-In Cartridge (1.06 MB)
- Performance Data
- Sun Model Code Explanation; 999-901-334 (343.9 KB)
- Units of Measure, Settings, and Conversions
- Cartridges: Materials of Construction
- Cavity Information (S-171) and Tooling
- Fluid Recommendations: Oil Viscosity, Cleanliness & Temperature
- CE Declaration of Conformity - XMD 12-2017 (133.69 KB)