Q641FTwo piece ball valve PN16 ～ PN25 is composed of piston type pneumatic actuator and ball valve. Pneumatic flange ball valve has the advantages of compact structure, small volume, reliable operation, low flow resistance coefficient, good sealing, easy maintenance, convenient installation and strong adaptability. Pneumatic flange ball valve is especially suitable for the medium is viscous, containing particles, fiber properties. Pneumatic flanged ball valves are widely used in petroleum, chemical, teaching equipment, light industry, high pressure equipment, pharmaceutical, paper making and other industrial automation control systems, for remote centralized control or local control.

Q641FMain technical parameters of type PN16 ～ PN25 pneumatic flange two piece ball valve

Nominal diameterDN(mm)	15	20	25	32	40	50	65	80	100	125	150	200
Rated flow coefficientKV	21	38	72	112	170	273	384	512	940	1452	2222	3589
Nominal pressure(MPa)	PN1.6、2.5、4.0、6.4 MPa；ANSI 150、300LB
Allowable differential pressure(MPa)	≤Nominal pressure
Valve body form	Two stage cast ball valve
Connection form	Flange type, welding type and thread type
Spool form	"O" type spherical valve core
Packing	V-type PTFE packing, flexible graphite packing, etc
Flow characteristics	Approximate quick opening type
Range of motion	0～90°
Leakage Q	According to GB / t4213-92, less than rated kv0.01%
Adjustable range	250：1								350：1
Configuration of actuator	It can be equipped with GT, Sr, St, at, AW series pneumatic actuators
control mode	20 mA control switch (4-position control switch)

Q641FMain parts and materials of PN16 ～ PN25 two piece ball valve with pneumatic flange

Part name	Material Science
	WCB	304(CF8)	316(CF8M)	316L(CF3M)
sphere	2Cr13+Nitriding treatment	304	316	316L
Stem	2Cr13	304	316	316L
Seat sealing ring	PTFE (polytetrafluoroethylene), ppl (para polyphenylene), metal seal (cemented carbide)
filler	V-type PTFE packing, flexible graphite

Q641FMain structural connection dimensions of PN16 ～ PN25 two piece ball valve with pneumatic flange（mm)

Nominal diameter DN(mm)	Main dimensions				Flange size
					PN1.6MPa				PN2.5MPa
	L	H	H1	L1	D	D1	D2	n-φd	D	D1	D2	n-φd
15	130	185	/	140	95	65	46	4-14	95	65	46	4-14
20	140	191	/	140	105	75	45	4-14	105	75	56	4-14
25	150	193	/	140	115	85	65	4-14	115	85	65	4-14
32	165	212	/	164	140	100	76	4-18	140	100	76	4-18
40	180	217	/	164	150	110	84	4-18	150	110	84	4-18
50	200	260	102	190	165	125	99	4-18	165	125	99	4-18
65	220	293	114	210	185	145	118	4-18	185	145	118	8-18
80	250	323	127	247	200	160	132	8-18	200	160	132	8-18
100	280	382	152	276	220	180	156	8-18	235	190	156	8-22
125	320	468	184	348	250	210	184	8-18	270	220	184	8-26
150	360	510	219	378	285	240	211	8-22	300	250	211	8-26
200	400	655	273	524	340	295	266	12-22	360	310	274	12-26
250	630	/	360	/	405	355	319	12-26	425	370	330	12-30
300	750	/	395	/	460	410	370	12-26	485	430	389	16-30