223 mm inch BOLT d (SIZE) BOLT LENGTH WASHER (SIZE) Lug Insert PRIMARY SIDE SECONDARY SIDE L1 L2 SCREW SIZE WIDTH ACROSS FLATS HEIGHT 80 3 M16 45 45 16 M16 24 40 100 4 M16 50 50 16 M16 24 40 125 5 M20 60 50 20 M20 30 50 150 6 M20 65 50 20 M20 30 50 200 8 M20 75 55 20 M20 30 60 250 10 M22 95 60 22 M22 32 70 mm inch a b c 80 3 WASHER THICKNESS TO BE USED FLANGE THICKNESS TO BE USED 17 100 4 26 125 5 29 150 6 33 200 8 39 250 10 53 mm inch a' b' c' 80 3 WASHER THICKNESS TO BE USED FLANGE THICKNESS TO BE USED 13 100 4 13 125 5 13 150 6 16 200 8 16 250 10 18 UNIT: mm UNIT: mm UNIT: mm . BUTTERFLY VALVE LUG BUTTERFLY VALVE TYPE 57L 1. BOLT LENGTH WHEN AV TS FLANGE 10K IS USED (WITH WASHER OF ISO 7092 OR EQUIVALENT) BOLT LENGTH WHEN A FLANGE OTHER THAN IN 2.1 IS USED * HIGH NUTS LISTED ABOVE CAN BE USED. For 80 and 100 mm, bolts with the same length can be used for both primary and secondary sides. Primary side bolt length L1 = a Washer thickness + b Flange thickness + c (Resin thickness + Engagement allowance) Secondary side bolt length L2 = a' Washer thickness + b' Flange thickness + c' (Engagement allowance) a' b' L2 L1 c' c b d a FLUID DIRECTION Secondary-side bolt Primary-side bolt Lug Insert PIPE BOLT DIMENSIONS (REFERENCE: RECOMMENDED DATA) APPENDICES