Stainless steel flanged ball valve

Overview

Stainless steel flanged ball valves can be tightly closed with a 90-degree rotation and minimal torque. The fully symmetrical valve body cavity provides a low-resistance, straight-through flow path for the medium. Ball valves are typically considered suitable for direct on/off applications, but recent developments have enabled their design for throttling and flow control functions. The main features of ball valves include a compact structure, ease of operation and maintenance, and suitability for general working media such as water, solvents, acids, and natural gas. They are also suitable for harsh working conditions involving media such as oxygen, hydrogen peroxide, methane, and ethylene. The valve body can be either a monoblock or a modular design. This type of valve should be installed in the horizontal direction of the pipeline.

Features

1. Low fluid resistance, with a resistance coefficient equivalent to that of a pipe segment of the same length.  
2. Simple structure, compact size, and lightweight.  
3. Tight and reliable sealing. Currently, the sealing surface materials of ball valves widely use plastic, ensuring excellent sealing performance, and they are also widely used in vacuum systems.
4. Easy to operate, with rapid opening and closing; only a 90° rotation is required to go from fully open to fully closed, making it suitable for remote control.  
5. Easy to maintain, as the ball valve has a simple structure and the sealing rings are typically removable, making disassembly and replacement convenient.
6. When fully open or fully closed, the sealing surfaces of the ball and valve seat are isolated from the medium, preventing erosion of the valve sealing surfaces when the medium flows through.  
7. Wide range of applications, with nominal diameters ranging from a few millimetres to several metres, and applicable from high vacuum to high-pressure environments.  
Ball valves are widely used in various industries such as petroleum, chemicals, power generation, papermaking, nuclear energy, aviation, and rocketry, as well as in everyday life.

Specification

Type	DN(mm)	Dimension(mm)
		L	D	D1	D2	b-f	Z-φd	H	W
Q41-16	15	130	95	65	45	14-2	4-φ14	65	115
	20	140	105	75	55	14-2	4-φ14	75	130
	25	150	115	85	65	14-2	4-φ14	85	150
	32	165	135	100	78	16-2	4-φ18	95	190
	40	180	145	110	85	18-3	4-φ18	105	230
	50	200	160	125	100	20-3	4-φ18	115	240
	65	220	180	145	120	22-3	8-φ18	145	280
	80	250	195	160	135	22-3	8-φ18	160	310
	100	280	245	190	160	24-3	8-φ23	185	330
	125	320	280	220	188	28-3	8-φ25	215	600
	150	360	335	250	218	30-3	8-φ25	245	800
	200	400	405	310	278	34-3	12-φ25	300	1000

 

Type	DN(mm)	Dimension(mm)
		L	D	D1	D2	b-f	Z-φd	H	W
Q41-yf40	15	140	95	60	45	14-2	4-φ14	60	145
	20	152	105	65	55	14-2	4-φ14	65	160
	25	165	115	75	65	14-2	4-φ14	75	180
	32	180	135	85	78	16-2	4-φ18	85	220
	40	190	145	95	85	16-3	4-φ18	95	230
	50	216	165	108	100	18-3	4-φ18	108	250
	65	241	180	140	120	20-3	8-φ18	140	290
	80	283	195	148	135	20-3	8-φ18	148	350
	100	305	230	180	155	20-3	8-φ18	180	460
	125	381	270	250	188	36-3	8-φ25	250	610
	150	403	300	275	218	38-3	8-φ25	275	800
	200	502	375	405	282	44-3	12-φ30	405	1000