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SMC小型比例电磁阀日本进口，SMC比例电磁阀安装说明
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The flow rate decreases due to change (increase) in outlet pressure, even if the inlet pressure and current value are the same.
Refer to curve B when ΔP is 0.5 MPa.
ΔP = (P1 - P2) MPa ΔP: Pressure differential P1: Inlet pressure P2: Outlet pressure
<Chart 1> PVQ30 (?1.6)
Current decreasing
Current increasing
Working Principle The armature is attracted to the core by electromagnetic force as the coil is energized.
When the applied current varies, the attraction force also varies proportionally to it.
The flow rate is controlled by the movement (stroke) of the armature,
depending on the balance between this attraction force and the spring load.
Note) Sliding resistance at this point is the hysteresis of the flow.
Vacuum chamber supply flow control -.
<To use orifice ?1.6 (See PVQ30: Chart 1)> Condition 1. P1 = 0.7 Mpa, P2 = 0 MPa (Atmospheric pressure)
Ex) At increasing current, the flow rate when 140 mA current is applied is 85 l/min. (See q.) If current decreases at this point,
Curve A ΔP = 0.7 MPa
Curve B ΔP = 0.5 MPa
Seal material: FKM (PVQ10, PVQ30) Valve returns to closed position when power supply is turned off.
Leakage amount: 5 cm3/min or less at OFF Can be used with vacuum. (Minimum operating pressure 0.1 Pa·abs)
Operation noise during opening/ closing of the valve reduced
Can be mounted on manifolds When continuously energizing adjacent valves at the same time,
ambient temperature rises since the coil generates heat. Implement measures to exhaust excess heat
so that the temperature remains within the range of the table on the right.
Coil Core Spring
Service life: Lasts 25 million cycles. (PVQ30) (SMC in-house life test conditions) Specially coated sliding s
urface realized 25 million cycles within set operating range Body material: Equivalent to C37 or Stainless Steel
the flow rate may not change by 135 mA due to hysteresis. (See w.) The flow rat
e at increasing current and decreasing current are not the same due to hysteresis. (q 85 l/min., e 93 l/min.) Refer to curve A when ΔP is 0.7 MPa.
Condition 2. P1 = 0.7 MPa, P2 = 0.2 MPa
Condition 3. In a vacuum
Ex) At increasing current, the flow rate when 150 mA current is applied is 65 l/min. (See r.) If the outlet pressure P2 increases by 0.15 MPa,
ΔP decreases by 0.15 MPa and becomes 0.35 MPa (See curve C), and the flow rate when the same current is applied is 40 l/min. (See t.)、
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