Series VXD Flow-rate Characteristics Note) Use this graph as a guide. In the case of obtaining an accurate flow rate, refer to pages 140 through to 144. Upstream pressure of valve P1 . 1.0 MPa Minimum operating pressure differential origin line (P1 + 1.033) = (1 to 1.89)(P2 + 1.033) Critical pressure Sonic Subsonic 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 10,000 20,000 30,000 40,000 20,000 40,000 60,000 20,000 40,000 60,000 80,000 50,000 Flow rate Q [L/min (ANR)] 1.0 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 Downstream pressure of valve (P2) [MPa] For Air (Orifice diameter: o35 mm, o40 mm, o50 mm) o35 o40 o50 In the area located left to the minimum operating pressure differential origin line in the flow-rate characteristics table, the minimum operating pressure is not generated. Do not use the product in this area as this may cause operation failure (valve opening failure, valve closing failure) or damage of the valve. Select valves with suitable size. Warning How to read the graph The sonic range pressure to generate a flow rate of 6000 L/min (ANR) is P1 . 0.57 MPa for a o15 orifice (VXD240�ｮ�ｮ/Port size: 3/8) and P1 . 0.22 MPa for a o20 orifice (VXD250�ｮ�ｮ/Port size: 3/4). 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 Upstream pressure of valve P1 . 1.0 MPa Minimum operating pressure differential origin line Critical pressure Sonic Subsonic 2,000 2,500 4,000 5,000 6,000 7,500 8,000 10,000 5,000 10,000 15,000 5,000 10,000 15,000 20,000 1,000 2,000 3,000 1,000 2,000 3,000 4,000 Flow rate Q [L/min (ANR)] 1.0 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 Downstream pressure of valve (P2) [MPa] For Air (Orifice diameter: o10 mm, o15 mm, o20 mm, o25 mm) o10 o10 o15 o15 o20 o25 Port size 1/4 Port size 3/8,1/2 Port size 3/8 Port size 1/2 Port size 3/8 Port size 1 Port size 1 1/4 Port size 1 1/2 Port size 145 VX2 VXK VXD VXZ VXS VXE VXP VXR VXH VXF2 VX3 VXA