Pneumatic/Electric ordinary type butterfly valve

ZSRW - Pneumatic ordinary type butterfly valve

ZDRW - Electric ordinary type butterfly valve

Advantage: compact structure, small size and light, small friction resistance, small return difference, stable motion

Application: used to large caliber, large flow, low pressure difference and normal leakage requirement.

Nominal dimension (mm)		80	100	125	150	200	250	300	350	400	450	500
Flow coefficient (Kv)	90^o	275	480	770	1100	1970	3000	4460	5840	7720	9440	12000
Flow coefficient (Kv)	60^o	136	239	365	525	890	1460	2130	2830	3730	4270	5840
Nominal dimension (mm)		600	700	800	900	1000	1200	1300	1500	1600	1800	2000
Flow coefficient (Kv)	90^o	17600	24000	31200	39400	48900	69500	81500	107300	126000	159000	197200
Flow coefficient (Kv)	60^o	8410	12000	14800	19700	23200	33900	39500	52300	61100	77200	95600
Rated travel		Regulating type: 70^o, two position: 90^o
Flow characteristics		Equal percentage
Nominal pressure		0.6, 1.0, 1.6MPa
Rangeability		70^o12:1; 90^o30:1
Action type		Pneumatic: pneumatic to open or close; Electric: electric to open or close
Flange standard		Clamp: JB78-59, JB79-59, JB/T79.1-94, JB/T79.2-94, ANSI, JIS, DIN