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Valve Types

Application, Selection

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Overview

Existing valve types

Which valve type for which application?

Efficiency Reliability

Comparison Old Valve Types New Valve Types

Optimised Valve Type Portfolio

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Overview on existing valve types

Type Description Hoerbiger Valve Types

Narrow Ported Plate

Valves

CED, CFD, , CKD,

(HDS), R, CT

Wide Ported Plate Valves E3D, F3D, G3D, H, J, K+ (CED, CFD lubed

design), CS

Narrow Ported Ring

Valves

CE

Wide Ported Ring Valves CX

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Which valve type for which

application?

special Gases

(O2, Cl)

Low temperature

Contaminated

Application (Dirt)

Heavy gases

Light Gases

Gas-storage

Gas-transport

Air

PoppetValves

Narrow

Ported

RingValves

WidePorted

Narrow

Ported

PlateValves

WidePorted

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Efficiency / Reliability

A compromise ?

Targets

- High Efficiency Low valve losses

- High Reliability Lifetime

Engineering parameters

- Valve design- Valve lift selection

- Material selection

Efficie

nc

y

Reliability

Engineering

parameters

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Design parameters influencing the

efficiency 1 available flow area

- length of the seat lands

- numbers of flow channels

curvature of the flow paths

- vorticity generated within the gas

edges within the flow channels

- increasing separation regimes

plate valve

profiled ring valve

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Design parameters influencing the

efficiency 2 Design of seat and guard areas

- saturation effects(drilled seats)

Influence of unloaders

- closing the seat area

Influence of plugs

- dereasing the flow area

0

10

20

30

40

50

0 2 4 6

Lift (mm)

PHI(cm)

PHI1

PHI2

PHI1 ... milled seat

PHI2 ... dri lled seat

Effective flow area (PHI)

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Prediction of efficiency - good models

are available Main valve parameters for efficiency calculation

- valve design

- valve lift

Lift (mm)Lift (mm)

gas

p

V

=

*2

D

areaflowequivalent

diametervalveD

D

l

l

=

4

2

VOLUME1 2 3

C

A

G

F

N

P

P

2

1

M

dischargevalve opens

dis.valvecloses

suctionvalve closes

suctionvalve opens

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Prediction of reliability

still a challenge

Life time ~ impact stresses ~ impact velocity Life time ~ material properties (low E modulus preferrable)

1.18

1.62

0

0.5

1

1.5

2

Rel.safety

factorS

23C

Relative safety factor S

compared to steel

STEEL

PEEK GF30

PA GF30 *)

= Ev

][

][

]/[

][

3mkgdensitymaterial

MPaModuluselasticityE

smvelocityimpactv

MPastressinduced

l

l

l

l

*) .. special PA compound

Measured improvements

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Goal for new valve designs

optimized seat and guard geometry

- no flow resistance effects

- enough space for unloaders- enough strength to avoid drilled seats

high impact resistance of the sealing elements

- optimised for the temperature of operation (MT, PK)

- high lifts possible Focus on specific valve design strengths

- Ring valves for critical applications

Individual engineering- Application based selection

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Basic Valve Type Portfolio

wide ported,profiled ring valves

wide (CS) and

narrow ported

plate valves

narrow ported

plate valves

narrow ported, profiled ring valves

low pressure

light gas

heavy gas

high pressure

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Conclusions

Advantages of modern, highly efficient valve types are

- efficient but still reliable- low lifts but still efficient

- exploiting modern non metallic sealing materials- high damping resistance

- optimized portfolio for different applications- wide and narrow ported

- ring and plate valves

- higher flexibility within the valve engineering process