Q41f ball valve is an important valve, which is widely used in petrochemical industry, long-distance pipeline and other fields. The closing part of the ball valve is a ball (or part of the ball) with a hole. The ball rotates with the valve stem to open or close the valve. In all kinds of valves, the flow resistance of ball valve is small. When the full diameter ball valve is opened, the ball channel, valve channel and connecting pipe diameter are equal and form a diameter, and the medium can flow through almost without loss. The ball valve can be fully closed and fully opened by rotating 90 ° and the valve can be opened and closed quickly. Compared with gate valve and stop valve of the same specification, the ball valve is small in size and light in weight, and easy to install in pipeline.

Q41F Pressure test of stainless steel floating ball valve

Nominal pressure	1.6	2.5	4.0
strength test	2.4	3.8	6.0
Water seal test	1.8	2.8	4.4
Airtight seal test	0.4-0.7

Q41F Main performance specification of stainless steel floating ball valve

Design and manufacture	Structural length	Flange size	Pressure temperature	Test inspection
GB122237	GB12221	GB9113 JB79	GB9131	GB/T13927 JB/T9092

 

Q41F Main parts materials of stainless steel floating ball valve

valve body		ZG1Cr18Ni9Ti	CF8	CF3	ZG1Cr18Ni12Mo2Ti	CF8M	CF3M
Ball stem		1Cr18Ni9Ti	304	304L	1Cr18Ni12Mo2Ti	316	316L
Valve seat	Polytetrafluoroethylene (PTFE) and Poe fiber reinforced polytetrafluoroethylene PTFE + glass p-phenylene ppl
shim	PTFE stainless steel / flexible graphite toothed gasket
Stem seat	PTFE stainless steel / flexible graphite
	PTFE reinforced flexible graphite
Packing gland		1Cr18Ni9Ti	304	304L	1Cr18Ni12Mo2Ti	316	316L
temperature	-29℃～150℃(Polytetrafluoroethylene PTFE) - 29 ℃ ~ 200 ℃ (glass fiber reinforced polytetrafluoroethylene PTFE + glass) - 29 ℃ - 300 ℃ (PPL)
medium	Steam oil	Nitric acid		Strong oxidation medium	Acetic acid		ureas

 

Q41F Main dimensions of stainless steel floating ball valve(mm)

Raised face flangeRF Q41F Q41PPL 16C 16P 16R	DN	L	D	D1	D2	b	n-φd	H	D0
	15	130	95	65	45	14	4-14	78	140
	20	140	105	75	55	14	4-14	84	160
	25	150	115	85	65	14	4-14	95	180
	32	165	135	100	78	16	4-18	150	250
	40	180	145	110	85	16	4-18	150	300
	50	200	160	125	100	18	4-18	170	350
	65	220	180	145	120	20	4-18	195	350
	80	250	195	160	135	20	8-18	215	400
	100	280	215	180	155	20	8-18	250	500
	125	320	245	210	185	22	8-18	265	600
	150	360	280	240	210	24	8-23	270	800
	200	400	335	295	265	26	12-23	330	1200
Raised face flange RF Q41F Q41PPL 25 25P 25R	15	130	95	65	45	16	4-14	103	140
	20	140	105	75	55	16	4-14	112	160
	25	150	115	85	65	16	4-14	123	180
	32	165	135	100	78	18	4-18	150	250
	40	180	145	110	85	18	4-18	156	300
	50	200	160	125	100	20	8-18	172	350
	65	220	180	145	120	22	8-18	197	350
	80	250	195	160	135	22	8-23	222	400
	100	280	230	190	160	24	8-23	253	500
	125	320	270	220	188	28	8-25	275	600
	150	360	300	250	218	30	8-25	286	800
	200	400	360	310	278	34	12-25	340	1200

Concave convex flange MFM Q41F Q41PPL 40 40P 40R	DN	L	D	D1	D2	D6	b	n-φd	H	D0
	15	130	95	65	45	40	16	4-14	103	140
	20	140	105	75	55	51	16	4-14	112	160
	25	150	115	85	65	58	16	4-14	123	160
	32	180	135	100	78	66	18	4-18	150	250
	40	200	145	110	85	76	18	4-18	156	250
	50	220	160	125	100	88	20	4-18	172	350
	65	250	180	145	120	110	22	8-18	197	350
	80	280	195	160	135	121	22	8-18	222	450
	100	320	230	190	160	150	24	8-23	253	450
	125	400	270	220	188	176	28	8-25	275	600
	150	400	300	250	218	204	30	8-25	286	800
	200	550	375	320	282	260	38	12-30	340	1200
Concave convex flange MFM Q41F Q41PPL 64 64P 64R	15	165	105	75	55	40	18	4-14	105	140
	20	190	125	90	68	51	20	4-18	125	160
	25	216	135	100	78	58	22	4-18	135	250
	32	229	150	110	82	66	24	4-23	150	350
	40	241	165	125	95	76	24	4-23	165	350
	50	292	175	135	105	88	26	4-23	175	450
	65	330	200	160	130	110	28	8-23	200	450
	80	356	210	170	140	121	30	8-23	210	600
	100	432	250	200	168	150	32	8-25	250	700
	125	508	295	240	202	176	36	8-30	295	1100
	150	559	340	280	240	204	38	8-34	340	1500

 

1. Be careful in installation and construction, and do not hit the valve.
2. Before installation, the ball valve should be inspected to check the specification and model, and identify whether there is damage, especially for the valve stem. Turn it a few times to see if it is skewed, because Zui is prone to bump the stem during transportation. Also remove the debris in the valve.
3. When lifting the ball valve, the rope should not be tied to the hand wheel or the valve stem to avoid damage to these parts, but should be tied to the valve body.
4. The pipeline connected to the ball valve must be cleaned. Compressed air can be used to blow away iron oxide chips, mud and sand, welding slag and other impurities. These debris, not only easy to scratch the sealing surface of the ball valve, in which large particles of debris (such as welding slag), but also block the small valve, so that its failure.
5. The position of valve handle rotation should be reserved during installation. 6. The ball valve cannot be used as throttling. 7. The ball valve with transmission mechanism shall be installed vertically.