3 Series 51-SY5000/7000/9000 Flow-rate Characteristics Series 51-SY7000 Note) [ ]: Normal position Series 51-SY5000 Note) [ ]: Normal position Series 51-SY9000 Valve model Type of actuation Single Double Closed center Exhaust center Pressure center Single Double Closed center Exhaust center Pressure center 2- position 3- position 2- position 3- position 2- position 3- position 1, 5, 3 (P, EA, EB) 4, 2 (A, B) 1→4/2 (P→A/B) 4/2→5/3 (A/B→EA/EB) C(dm b Cv 3/ (s・bar)) b Cv C(dm3/ (s・bar)) Port size Flow-rate characteristics Note) 51-SY5 20- -01 51-SY5 20- -C4 51-SY5 20- -C6 Single Double Closed center Exhaust center Pressure center 2- position 3- position 51-SY5 20- -C8 1.9 1.5 0.61 0.59 [0.40] 0.35 0.44 0.39 0.32 [0.43] 0.49 0.41 2.4 2.5 [1.5] 1.7 0.43 0.45 1.8 0.35 0.46 2.2 [0.91] 0.46 0.46 [0.58] 0.38 0.61 [0.28] 1.8 0.75 0.75 0.30 0.30 [0.27] 0.43 0.36 0.64 0.64 [0.53] 0.20 0.19 0.85 0.84 [0.84] 1.5 1.3 0.52 0.44 [0.35] 0.33 0.33 0.37 0.35 [0.37] 0.33 0.33 2.0 1.8 [1.4] 0.74 0.40 0.19 0.84 0.57 0.28 0.78 [0.71] 0.27 0.44 [0.37] 0.57 0.21 [0.18] 0.84 1.9 1.4 0.57 0.52 [0.43] 0.21 0.38 0.29 0.37 [0.41] 0.45 0.39 2.3 2.0 [1.5] 1.6 0.29 0.39 1.7 0.38 0.46 2.2 [1.6] 0.50 0.32 [0.44] 0.41 0.56 [0.44] 1.8 1.3 0.31 0.33 1.6 0.32 0.39 1.7 [0.80] 0.44 0.31 [0.47] 0.33 0.42 [0.23] 1.7 Single Double Closed center Exhaust center Pressure center 1/8 1/8 Single Double Closed center Exhaust center Pressure center Single Double Closed center Exhaust center Pressure center Single Double Closed center Exhaust center Pressure center 2- position 3- position 2- position 3- position 2- position 3- position 1, 5, 3 (P, EA, EB) 1 (P) port 1/4 5, 3 (EA, EB) port 1/8 4, 2 (A, B) 1→4/2 (P→A/B) 4/2→5/3 (A/B→EA/EB) C(dm b Cv 3/ (s・bar)) b Cv C(dm3/ (s・bar)) Port size Flow-rate characteristics Note) 51-SY7 20- -02 51-SY7 20- -C8 51-SY7 20- -C10 C8 o8 onetouch fitting C8 o8 onetouch fitting C8 o8 onetouch fitting C10 o10 onetouch fitting C12 o12 onetouch fitting C6 o6 onetouch fitting C4 o4 onetouch fitting C10 o10 onetouch fitting 1/4 4.1 2.5 3.2 2.4 3.8 2.5 0.81 0.82 [0.54] 0.82 0.70 [0.56] 0.82 0.70 [0.56] 0.23 0.39 0.26 0.25 0.26 0.25 0.33 0.35 [0.38] 0.37 0.42 [0.46] 0.34 0.38 [0.38] 0.93 0.65 0.77 0.57 0.86 0.59 3.3 3.4 [2.1] 2.9 0.31 0.70 2.4 0.38 0.63 4.3 [2.4] 0.58 0.23 [0.32] 0.39 0.97 [0.61] 2.2 2.6 0.24 0.63 2.4 0.31 0.62 3.3 [2.4] 0.60 0.28 [0.22] 0.34 0.78 [0.57] 2.2 2.8 0.27 0.67 2.4 0.21 0.59 3.8 [2.4] 0.61 0.25 [0.31] 0.38 0.89 [0.61] 2.3 3.2 2.6 [1.9] 3.2 2.7 [2.0] Valve model Single Double Single Double Single Double 2- position 2- position 2- position 1, 5, 3 (P, EA, EB) 4, 2 (A, B) 1→4/2 (P→A/B) 4/2→5/3 (A/B→EA/EB) C(dm b Cv 3/ (s・bar)) b Cv C(dm3/ (s・bar)) Port size Flow-rate characteristics 51-SY9 20- -02 51-SY9 20- -03 51-SY9 20- -C8 Single Double 2- position 51-SY9 20- -C10 Single Double 2- position 51-SY9 20- -C12 7.0 0.33 1.7 7.6 0.35 2.0 8.0 0.29 1.9 8.0 0.33 2.0 4.3 0.28 0.96 7.1 0.32 1.7 6.1 0.28 1.4 7.9 0.33 1.9 7.0 0.25 1.6 8.6 0.41 2.2 1/4 1/4 3/8 Type of actuation Valve model Type of actuation