Reference：JB/T7673-95 Standard (Methodology for Compiling Vacuum Equipment Model Numbers).
1．Scope and Content：
This document defines the methods of compiling vacuum valve model numbers.
This document applies to various series of vacuum valves.
2． Composition of Vacuum Valve Model Numbers：
A full model number comprises a basic model number and an auxiliary model number. The two model numbers are separated by a dash symbol. The structure of a model number is as follow:
3． Vacuum Valve：
indicates the applicable vacuum level of the vacuum valve (See Table 1).
indicates the type of the valve plate structure (See Table 2).
indicates the drive mode of the vacuum valve (See Table 3).
indicates the type of the electric actuator (See Table 4-1).
indicates the motion of the pneumatic vacuum valve and the rotation angle/Mounting position/quantity of the cylinder (See Table 4-2).
indicates the type of channel of the vacuum valve, as shown in Table 5.
indicates the nominal diameter(cm) of the vacuum valve by numeric numbers.
indicates the material of the valve body (See Table 7) .
indicates the sealing method of the valve shaft seal (See Table 8). If the shaft seal has an O-ring sealing structure, this can be omitted.
indicates the flange connection method (See Table 9).
indicates the water-cooling method (See Table 10).
Table 1: Symbols for the applicable vacuum level
| Symbol | C |
G |
D |
Meaning |
Ultra-High Vacuum Valve |
High Vacuum Valve |
Low Vacuum Valve |
Meaning & Chinese Pinyin |
“超”高真空阀 |
“高”真空阀 |
“低”真空阀 |
Table 2: Symbols for the structure types of the valve plate
Symbol |
Meaning |
Meaning & Chinese Pinyin |
|
A |
Safety Valve |
“安”全阀 |
“a”n |
B |
Isolation Pendulum Valve |
“摆”式隔离阀 |
“b”ai |
C |
Gate Valve |
“插”板阀 |
“c”ha |
D |
Baffle Valve |
“挡”板阀 |
“d”ang |
F |
Flap Valve |
“翻”板阀 |
“f”an |
H |
Check Valve |
止“回”阀 |
z“h”i |
I |
Butterfly Valve |
“蝶”阀 |
d“i”e |
M |
Diaphragm Valve |
隔“膜”阀 |
“m”o |
R |
Arc Valve |
“弧”阀 |
a“r”c |
S |
Cylinder Valve |
柱“塞”阀 |
“s”ai |
U |
Ball Valve |
“球”阀 |
qi“u” |
W |
Gas Dosing Valve |
“微”调阀 |
“w”ei |
Y |
Electromagnetic Differential Valve |
电磁带充气“压”差阀 |
“y”a |
Table 3: Symbols for the drive modes of the vacuum valve
| Symbol | D |
C |
Q |
Y |
Meaning |
Electric Valve |
Electromagnetic Valve |
Pneumatic Valve |
Hydraulic Valve |
Meaning & Chinese Pinyin |
“电”动阀 |
电“磁”阀 |
“气”动阀 |
“液”动阀 |
Table 4-1: Symbols for types of electric actuator
| Actuator | Symbol |
220V/90° On/Off type electric actuator |
A |
24V/90° On/Off type electric actuator |
a |
220V/90° current-regulating electric actuator |
B |
24V/90° current-regulating electric actuator |
b |
220V/90° voltage-regulating electric actuator |
D |
24V/90° voltage-regulating electric actuator |
d |
Table 4-2: Symbols for types of pneumatic actuator
| Pneumatic Cylinder | Symbol |
Straight stroke double-acting actuatorOpen & close signals |
A |
Straight stroke double-acting actuator with cushion Open & close signals |
a |
Two Straight stroke double-acting actuator Open & close signals |
B |
Two Straight stroke double-acting actuator with cushion Open & close signals |
b |
Three Straight stroke double-acting actuator Open & close signals |
D |
Three Straight stroke double-acting actuator with cushion Open & close signals |
d |
Straight stroke two-stage single-acting normally closed actuator Open or close signal |
C |
Straight stroke single-acting normally closed actuator Open or close signal |
E |
Straight stroke single-acting normally open actuator Open or close signal |
e |
Side-mounted straight stroke actuator Open & close signals |
F |
Side-mounted straight stroke actuator with cushion Open & close signals |
f |
Side-mounted straight stroke single-acting normally closed actuator Open or close signal |
G |
Side-mounted straight stroke single-acting normally open actuator Open or close signal |
g |
< 90° double-acting rack and pinion rotary actuator Open & close signals |
H |
< 90° single-acting rack and pinion rotary actuator Open or close signal |
h |
90° double-acting rack and pinion rotary actuator Open & close signals |
J |
90° single-acting normally closed rack and pinion rotary actuator Open or close signal |
j |
90° single-acting normally open rack and pinion rotary actuator Open or close signal |
k |
90° double-acting scotch yoke actuator Open & close signals |
M |
90° single-acting normally closed scotch yoke actuator Open or close signal |
m |
90° single-acting normally open scotch yoke actuator Open or close signal |
n |
Up-down & left rotary actuator (Clockwise) Open & close signals |
L |
Up-down & right rotary actuator (Counter-clockwise) Open & close signals |
R |
Up-down & 90 degrees rotary actuator |
Y |
Center-mounted 180° double-acting rack and pinion rotary actuator Open & close signals |
X |
Center-mounted 180° double-acting rack and pinion rotary actuator with cushion。Open & close signals |
Z |
Table 5: Symbols for the types of channel of the vacuum valve
| Symbol | S |
L |
J |
Meaning |
3-way with T-shape |
3-way with L-shape |
Right-angle shape |
Meaning & Chinese Pinyin |
T型的“三”通形式 |
“L”型的三通形式 |
直“角”式 |
(Note: Straight type does not use any symbol）
Table 6: Nominal diameter of the vacuum valve (Omitted)
Table 7: Symbols for the material of the valve body：
| Material | Symbol |
Material |
Symbol |
Carbon Steel |
C |
Aluminum Alloy |
L |
06Cr19Ni10 |
P |
022Cr17Ni12Mo2 |
R |
Copper & Copper Alloys |
T |
(Note: Carbon Steel “C” is generally not labeled)
Table 8: Symbols for sealing methods of the valve shaft seal
Sealing Method |
Material |
Symbol |
Seal Ring |
FKM components |
No Symbol |
Hydraulic formed Bellows |
SUS316L，FKM |
b |
Welded Bellows |
SUS316L，FKM |
h |
Ferrofluid |
|
c |
Table 9: Symbols for flange connection method
| Flange connection methods | Symbol |
ISO-KF; Centering ring |
A |
ISO-K; Centering ring |
B |
ISO-F; Centering ring; Connected by screws; Fixed flange |
C |
ISO-F; Centering ring; Connected by screws; Lap joint flange |
D |
ISO-F; One side with seal groove; One side with smooth surface; Connected by screws; Fixed flange |
G |
ISO-F; One side has seal groove; One side has smooth surface; Connected by screws; Lap joint flange |
g |
ISO-F; Two sides have seal grooves; Connected by screws; Fixed flange |
H |
ISO-F; Two sides have seal grooves; Connected by screws; Lap joint flange |
h |
ISO-F; Two sides have smooth surfaces; Connected by screws; Fixed flange |
J |
ISO-F; Two sides have smooth surfaces; Connected by screws; Lap joint flange |
j |
ISO-CF; OFHC copper gasket; Connected by screws; |
K |
ISO-COF; OFHC copper wire; Connected by screws; |
O |
GB6070; One side has seal groove; One side has smooth surface; Connected by screws; Fixed flange |
M |
GB6070; One side has seal groove; One side has smooth surface; Connected by screws; Lap joint flange |
m |
GB6070; Two sides have seal grooves; Connected by screws; Fixed flange |
N |
GB6070; Two sides have seal grooves; Connected by screws; Lap joint flange |
n |
GB6070; Two sides have smooth surfaces; Connected by screws; Fixed flange |
Q |
GB6070; Two sides have smooth surfaces; Connected by screws; Lap joint flange |
q |
JIS Two sides have smooth surfaces; Connected by screws; Fixed flange |
R |
JIS Two sides have smooth surfaces; Connected by screws; Lap joint flange |
r |
JIS One side has seal groove; One side has smooth surface; Connected by screws; Fixed flange |
E |
JIS One side has seal groove; One side has smooth surface; Connected by screws; Lap joint flange |
e |
JIS Two sides have seal grooves; Connected by screws; Fixed flange |
T |
JIS Two sides have seal grooves; Connected by screws; Lap joint flange |
t |
919; Two sides have smooth surfaces; Connected by screws; Fixed flange |
F |
919; Two sides have smooth surfaces; Connected by screws; Lap joint flange |
f |
919; One side has seal groove; One side has smooth surface; Connected by screws; Fixed flange |
I |
919; One side has seal groove; One side has smooth surface; Connected by screws; Lap joint flange |
i |
919; Two sides have seal grooves; Connected by screws; Fixed flange |
Y |
919; Two sides have seal grooves; Connected by screws; Lap joint flange |
y |
Table 10: Symbols for Water Cooling Methods
| Valve Cooling Method | Symbol |
Valve plate, support plate, two flanges, valve body |
A |
Valve plate, support plate, two flanges |
B |
Valve plate, support plate |
C |
Valve plate |
D |
Valve plate, two flanges, valve body |
E |
Valve plate, two flanges |
F |
Two flanges |
G |
One flange |
H |
Valve body |
W |
4. Example of Model Number Interpretation
| No. | Model Number | Interpretation | Name |
1 |
GDQE-J40LbA |
- Pneumatic high vacuum baffle valve |
Pneumatic Vacuum Aluminum Alloy Baffle Valve |
2 |
GCQa-400RhQD |
- Pneumatic high vacuum gate valve |
Pneumatic Vacuum Water Cooling Gate Valve |
(Note: For all vacuum valve products of our company, regardless of high or low vacuum, are collectively referred to as vacuum valves.)