Q644F、Q645F-16CT-type pneumatic three-way flange cast steel ball valve can be divided into T-type pneumatic three-way ball valve and L-type pneumatic three-way ball valve. T-type three-way ball valve can make three orthogonal pipelines connect with each other and cut off the third channel, which plays the role of shunt and confluence. The L-type three-way ball valve can only connect two mutually orthogonal pipelines, and can not keep the third pipeline interconnected at the same time, so it can only play the role of shunt. The characteristics of pneumatic three-way ball valve are as follows:
1. Three way ball valve with one valve is multi-purpose: any port can be used as the inlet without leakage, and the three-way ball valve can be made into L-type port and T-type port.
2. The structure of the three-way ball valve adopts the sealing type of integrated junction and four side valve seat, with less flange connection and high reliability, and the design realizes lightweight.
3. Three way ball valve has the advantages of compact structure, quick opening and closing, smooth flow passage and small fluid resistance.

Q644F、Q645F-16CMain performance parameters of cast steel ball valve with three-way flange

Nominal pressure PN(MPa)	Test pressure
	housing	High pressure liquid seal
1.6	2.4	1.76	0.6
2.5	3.75	2.75
4.0	6.0	4.4
CLASS150	3.0	2.2
Applicable conditions	Applicable media		Water, oil, gas and other non corrosive media and acid-base corrosion medium
	Applicable temperature		-28～350℃
Application specification	Connecting flange		JB79-59 GB9113、 HG20592-97、 ANSI B16.5
	Inspection and test		JB/T 9092-99 、API598

Q644F、Q645F-16CMaterial of main parts of cast steel ball valve with flange type a pneumatic tee

Part name	texture of material
	GB	ASTM
Valve body and cover	WCB	A216-WCB
seal ring	PTFE、Para polyphenylene	PTFE、Para polyphenylene
sphere	1Cr18Ni9Ti	SS 304
Valve seat and stem	2Cr13	A246-416
Stud bolt	35CrMoA	A193-B7

Q644F、Q645F-16CDimensions of cast steel L-type ball valve with T-type pneumatic tee flange（mm)

model	Nominal diameter DN(mm)	size(mm)
		L	L2	D	D1	D2	b	f	Z-d	H	W
Q644F-16 Ltype	15	150	72	95	65	45	14	2	4-14	95	130
	20	160	80	105	75	55	14	2	4-14	110	130
	25	180	90	115	85	65	14	2	4-18	120	140
	32	200	100	135	100	78	16	2	4-18	144	180
	40	220	110	145	110	85	16	3	4-18	152	220
	50	240	120	160	125	100	16	3	4-23	182	220
	65	260	130	180	145	120	16	3	4-18	193	240
	80	280	140	195	160	135	20	3	8-18	217	270
	100	320	160	215	180	155	20	3	8-18	245	350
	125	380	190	245	210	185	22	3	8-18	282	500
	150	440	220	280	240	210	24	3	8-23	319	600
	200	550	260	335	295	265	26	3	12-23	380	1000
	250	670	310	405	355	320	30	3	12-25	460	1400
	300	720	370	460	410	375	30	3	12-25	520	1800

Q644F、Q645F-16Ctype（mm)

model	Nominal diameter DN(mm)	size(mm)
		L	L2	D	D1	D2	b	f	Z-d	H	W
Q645F-16 Ttype	15	150	72	95	65	45	14	2	4-14	95	130
	20	160	80	105	75	55	14	2	4-14	110	130
	25	180	90	115	85	65	14	2	4-18	120	140
	32	200	100	135	100	78	16	2	4-18	144	180
	40	220	110	145	110	85	16	3	4-18	152	220
	50	240	120	160	125	100	16	3	4-23	182	240
	65	260	130	180	145	120	16	3	4-18	193	270
	80	280	140	195	160	135	20	3	8-18	217	350
	100	320	160	215	180	155	20	3	8-18	245	500
	125	380	190	245	210	185	22	3	8-18	282	600
	150	440	220	280	240	210	24	3	8-23	319	1000
	200	550	260	335	295	265	26	3	12-23	380	1300
	250	670	310	405	355	320	30	3	12-25	460	1700
	300	720	370	460	410	375	30	3	12-25	520	2100

Preparation before installation of pneumatic ball valve:
1. Ensure that the installation position of the pneumatic pipeline ball valve is in the coaxial position, and the two flanges on the pipeline shall be kept parallel to confirm that the pipeline can bear the weight of the pneumatic pipeline ball valve. If it is found that the pipeline can not bear the weight of the pneumatic pipeline ball valve, the corresponding support shall be provided for the pipeline before installation.
2. To confirm whether there are impurities and welding slag in the pipeline, the pipeline must be blown clean.
3. Check the name plate of the pneumatic pipeline ball valve, and operate the pneumatic pipeline ball valve fully open and closed for several times to confirm that the valve can work normally, and then check all details of the valve once again to ensure that the valve is intact.
4. Remove the protective covers at both ends of the valve, check whether the valve body is clean, and clean the inner cavity of the valve body. Since the sealing surface of the ball valve in the pneumatic pipeline is ball shaped, even small impurities may cause damage to the sealing surface.
Installation of pneumatic pipeline ball valve:
1. Any section of the pneumatic pipeline ball valve can be installed at the upstream end, and the handle pneumatic pipeline ball valve can be installed at any position of the pipeline. If the pneumatic pipeline ball valve with actuator (such as gearbox and electro pneumatic actuator) is equipped, it must be vertically installed, and the inlet and outlet of the valve shall be in horizontal position.
2. The sealing gasket shall be installed between the flange of the ball valve and the flange of the pipeline according to the design requirements of the pipeline.
3. The bolts on the flange shall be tightened symmetrically, successively and evenly.
4. If pneumatic and electric actuators are adopted for pneumatic pipeline ball valve, the installation of air source and power supply shall be completed according to the manual.
Inspection after installation of pneumatic pipeline ball valve:
1. After the installation, start the pneumatic pipeline ball valve to open and close several times. The action should be flexible and the force should be uniform. The pneumatic pipeline ball valve should work normally.
2. According to the design requirements of the pipeline pressure, the sealing performance of the joint surface between the pneumatic pipeline ball valve and the pipe flange is tested after pressurization.