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Hand Wheel Gate Valve
May 12, 2019

Hand Wheel Gate Valve


I. Design Tasks


Design task, that is, design task book. Define the specific parameters of the valve, such as nominal diameter, nominal pressure, temperature, medium, driving mode, etc. Use conditions and requirements, such as: outdoor or indoor installation, start-up frequency, etc. Relevant implementation standards.


(1) Design Topic: Design of Open-stem Gate Valve


(2) Main contents of design:


Valve is an important part of pipeline system, which should meet the safety and reliability requirements of pipeline system. Its components can be drawn and assembled by CAD, UG and other software to complete the design.


(3) The design content: determine the main material of the valve


Structural design of gate valve: pressure bearing parts, sealing pairs, body and cover, stem, gate, flange, bracket, stem nut, packing cover, handwheel


(4) Designing given data:

Number

Name

Symbol

Company

Formulas or sources

data

1

Nominal diameter

DN

mm

Design given

80

2

Nominal pressure

PN

Mpa

Design given

4

3

temperature

T

Design given

20

4

medium



Design given

Water and oil products

5

Driving mode



Design given

Manual

6

Additional allowance


mm

Design given

5

7

Wall thickness coefficient

k1


PN=2.0MPa時,k1=1.3;PN≥5.0MPatime  k1=1

1

8

Seal face width

bm

mm

Design given

2.5

9

Inside diameter of sealing surface


d

mm

Design given

80

10

Stem diameter

df

mm

Design given

22

11

Medium pressure

P

MPa

Design given

1

12

Total height of packing layer

hT

mm

Design given

3

13

Friction coefficient between stem and packing

μT



0.01

(5) Requirements for conditions of use:


Room temperature 20 C, no indoor and outdoor requirements, manual control.


(6) Connection with pipelines:


Flange connection


(vii) Relevant implementation standards [2]:


Design criteria:


Design Series: Low Pressure Small Caliber Series Gate Valves


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