216 BALL VALVE TYPE 21, TYPE 21α / WATER BALL VALVE 3 WAY BALL VALVE TYPE 23 0 50 100 Cv VALUE (%) OPENING DEGREE (%) 0 10 20 30 40 50 60 70 80 90 100 RESULTANT Cv VALUE 0 50 100 Cv VALUE (%) OPENING DEGREE (%) 0 10 20 30 40 50 60 70 80 90 100 0 50 100 Cv VALUE (%) OPENING DEGREE (%) 0 10 20 30 40 50 60 70 80 90 100 DIRECTION A-C DIRECTION A-B 0 50 100 Cv VALUE (%) OPENING DEGREE (%), DIRECTION A to B 0 10 20 30 40 50 60 70 80 90 100 DIRECTION C-A 0 50 100 Cv VALUE (%) OPENING DEGREE (%), DIRECTION C to A 0 10 20 30 40 50 60 70 80 90 100 TYPE 21, TYPE 21α: 15 mm . 100 mm WATER BALL VALVE: 15 mm . 50 mm DOUBLE L PORT (STANDARD) L PORT (OPTION) CROSS PORT (OPTION) DIRECTION A to B, DIRECTION A to C, OPENING DEGREE (%) DIRECTION A to C CROSS PORT (OPTION) DIRECTION C to A 90° 45° 0° 90° 45° 0° A B C 180° 90° 0° A B C 90° 45° 0° FULL-OPEN Cv VALUE mm 15 20 25 32 40 50 65 80 100 inch 1/2 3/4 1 1 1/4 1 1/2 2 2 1/2 3 4 FULL-OPEN Cv VALUE 14 29 47 72 155 190 365 410 680 FULL-OPEN Cv VALUE mm 15 20 25 32 40 50 65 80 100 inch 1/2 3/4 1 1 1/4 1 1/2 2 2 1/2 3 4 FULL-OPEN Cv VALUE L PORT 7.4 10 23 33 43 59 111 130 260 DOUBLE L PORT 6.3 8.5 20 27 36 45 84 99 200 CROSS PORT 7.8 13 23 49 65 98 . . .