Standard for preparation method of domestic general gate valve model
Time: 2019-05-08 23:56:03 Source: Yonglong Valve Reading: zero second
Standard for preparation method of gate valve model
I. The recommended national standard GB/T 32808-2016 Valve Model Preparation Method shall be adopted for the preparation of gate valve models
II. Preparation method of gate valve model
The gate valve model consists of 7 units, including valve type, driving mode, connection mode, structural type, sealing surface material or lining material type, pressure code or working pressure at working temperature, and valve body material. The model is shown as follows:
I (Unit 1) II (Unit 2) III (Unit 3) IV (Unit 4) V (Unit 5) - VI (Unit 6) VII (Unit 7)
I (Unit 1): valve type code
II (2 units): driving mode code
III (3 units): connection form code
Ⅳ (4 units): structure type code
V (Unit 5): Code of valve seat sealing surface material or lining material
Ⅵ (6 units): nominal pressure code or working pressure code at working temperature
Ⅶ (Unit 7): Valve body material code
III. Representation method of gate valve model code:
⑴ Valve type code: gate valve code is represented by Z
⑵ Gate valve driving mode code:
|
Drive mode |
|
|
Drive mode |
Code |
|
Electromagnetism |
zero |
|
Electric |
nine |
|
Electromagnetic hydraulic |
one |
|
Pneumatic |
six |
|
Electro hydraulic |
two |
|
Bevel gear |
five |
|
worm |
three |
|
Pneumatic hydraulic |
eight |
|
Spur gear |
four |
|
Hydraulically |
seven |
Note:
1. Code 1, code 2 and code 8 are used for gate valve opening and closing. Two power sources are required to operate the gate valve at the same time
2. This code is omitted for gate valves with handwheel directly connected to valve stem operation structure.
3. For the gate valve operated by pneumatic or hydraulic mechanism: the normally open type is 6K, 7K; The normally closed type is represented by 6B and 7B.
4. The gate valve of explosion-proof electric device is represented by 9B.
⑶ Connection type code of gate valve connection end:
|
Connection type |
Code |
|
Connection type |
Code |
|
Internal thread |
one |
|
Pair clamp |
seven |
|
External thread |
two |
|
Clamp |
eight |
|
Flange type |
four |
|
Ferrule |
nine |
|
Welded |
six |
|
|
|
⑷ Gate valve structure type code:
|
structural style |
Code |
|
Valve rod lifting type (rising stem) |
Wedge ram |
Elastic ram |
zero |
|
|
|
Rigid ram |
Single ram |
one |
|
|
|
|
Double ram |
two |
|
|
Parallel ram |
|
Single ram |
three |
|
|
|
|
Double ram |
four |
|
Valve rod non lifting type (non rising stem) |
Wedge ram |
|
Single ram |
five |
|
|
|
|
Double ram |
six |
|
|
Parallel ram |
|
Single ram |
seven |
|
|
|
|
Double ram |
eight |
(5) Gate valve sealing surface or lining material code:
|
Sealing surface or lining material |
Code |
|
Sealing surface or lining material |
Code |
|
Tin base bearing alloy (babbitt) |
B |
|
Nylon plastic |
N |
|
enamel |
C |
|
Boriding steel |
P |
|
Nitrided steel |
D |
|
Lead lining |
Q |
|
Fluoroplastics |
F |
|
austenitic stainless steel |
R |
|
ceramics |
G |
|
Plastic |
S |
|
Cr13 series stainless steel |
H |
|
copper alloy |
T |
|
Rubber lining |
J |
|
rubber |
X |
|
Monel |
M |
|
Hard alloy |
Y |
Note:
1. When the sealing surface material of the gate valve sealing pair is different, it is indicated by the material with low hardness.
2. When the gate valve sealing pair material is the valve body material, the valve seat sealing surface material code is represented by "W".
(6) Gate valve body material code:
|
body material |
Code |
|
body material |
Code |
|
carbon steel |
C |
|
Copper and copper alloy |
T |
|
Ductile iron |
Q |
|
aluminium alloy |
L |
|
Cr13 series stainless steel |
H |
|
Titanium and titanium alloys |
Ti |
|
0Cr17Ni12Mo2 stainless steel |
R |
|
0Cr18Ni9 stainless steel |
P |
|
1Cr5Mo chromium molybdenum steel |
I |
|
Chromium molybdenum vanadium steel |
V |
|
00Cr17Ni14Mo2 stainless steel |
RL |
|
00Cr19Ni10 stainless steel |
PL |
|
Plastic |
S |
|
Grey cast iron |
Z |
|
malleable iron |
K |
|
|
|
Note:
1. Grey cast iron valve body with PN ≤ 16 and carbon steel valve body material with PN ≥ 25 can be omitted in model preparation.
2. CF3, CF8, CF3M, CF8M and other material grades can be directly marked on the valve body.
IV. Example of gate valve model preparation
Z41H-16C
Manual, flanged, rising stem wedge type rigid single gate, valve seat sealing surface material is Cr13 stainless steel, nominal pressure is PN16 (working pressure is 1.6 MPa), and valve body material is carbon steel: Z41H type PN16 steel wedge gate valve
Z6s41Y-25
Pneumatic gate valve with manual, flange connection, rising stem wedge type rigid single gate, hard alloy seat sealing surface material, nominal pressure of PN25 (working pressure of 2.5 MPa), carbon steel valve body material: Z6s41Y PN25 pneumatic wedge type gate valve with manual
Z540Y-40I
Bevel gear driven, flange connected, rising stem wedge type elastic gate, valve seat sealing surface material is hard alloy, nominal pressure is PN40 (working pressure 4.0 MPa), valve body material is 1Cr5Mo chrome molybdenum steel gate valve: Z540Y type PN40 steel bevel gear driven wedge gate valve
Z944W-16Q
Electric, flange connected, rising stem parallel rigid double gate, valve seat sealing surface material is nodular cast iron, nominal pressure is PN16 (working pressure is 1.6 MPa), valve body material is nodular cast iron: Z944W type PN16 iron electric parallel double gate valve
Z60Y-320
Manual, butt welded, rising stem wedge type elastic gate, valve seat sealing surface material is hard alloy, nominal pressure is PN320 (working pressure 32.0 MPa), valve body material is carbon steel gate valve: Z60Y-320 high-temperature and high-pressure butt welded wedge gate valve for power station
Note: The connection type of "flange", the structural type of "rising stem", "elastic", "rigid" and "single ram" are omitted in the naming.
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