Commonly used valve length, commonly used valve sizes

Valve repair often produce some of the tooling or fixtures, valves repairman installed fixture design size and valve size as the processing in accordance with, the following are some common structure of the valve length, in the hope valve door repair colleagues help.

Structure of the valve length: the length of the commonly used valve between the flanges expressed with the L code, the media flow path of the valve DN code expression, usually used to indicate the size of the valve, have on the body a distinct label. Like the following figure

 

 

1、        单闸板闸阀长度

公称 直径DN	Body length（㎜）
	PN1.0MPa	PN1.6MPa	PN2.5MPa	PN4.0MPa
15		130	130	130
20		150	150	150
25		160	160	160
32		180	180	180
40	165	200	200	200
50	180	250	250	250
65	195	265	265	280
80	210	280	280	310
100	230	300	300	350
125	255	325	325	400
150	280	350	350	450
200	330	400	400	550
250	380	450	450	650
300	420	500	500	750
350	450	550	550	850
400	480	600	600	950
450	510
500	540

2、        双闸板闸阀长度（PN1.0Mpa）

 

 

3、        截止阀长度（包括柱塞截止阀）

注：① 铁制截止阀为110

②铁制截止阀为140

③ 氨用、氯用截止阀为650

    ④ 氨用氯用截止阀为700

4、        J11型丝接截止阀长度（PN1.6Mpa）