PSV Sizing

1.293 1.251 1.429 0.0899 0.717

3

Kv = Cv * 0.864 Cv = Kv * 1.157 1 bar = 14.22 PSI 1 PSI = 0.07031 bar 1 bar = 0.1 MPa

Air N2 O2 H2 CH4

kg/m kg/m kg/m kg/m kg/m

Zimmerli Messtechnik AG Riehen +41 61 645 98 00 [email protected]

1 MPa = 10 bar

Calculation acc. to Calame a. Hengst

www.zimmerli-inert.com www.zimmerliag.com

Only for gases Only for low pressure regulator ZM-R, ZM-B and LPR, LPS 1st step: Enter all known application / process parameters first Kv results upon completion

Seat Prim Pr imar ary y pr pres essu sure re Seco Se cond ndar ary y pre press ssur ure e Differential pressure Iner In ertt ga gas s Ambie Am bience nce// pro proces cess s Targ Ta rge et fl flow ow Theoretically Sizing

Kv = p1 = p2 = Delta p = Dens De nsit ity y= Temper Tem peratu ature re = Gas Ga s= Gas = Gas =

uotat uotat on r er ag ag ag

o: o: o: o: o: o:

6.500 3.000 bar absolute 1.000 bar absolute 2.000 bar 3 1.251 kg/m 20.0 °C 102.000 Nm3/h 261.761 Nm N m3/h 204.000 Nm3/h

2nd step: P1 3.000 If required, test a different Kv (seat) from the data sheet 0.000 Rule: (Kv Seat ≥ Kv Sizing) 0.000 is critical or too small! Kv values 6.500 Kv Seat 5.066

Result for reducer LPR, ZM-R

Differential pressure sufficient for calculation Seat and Kv sufficient, test lower Kv value, if required

Result for relief valve LPS, ZM-B


Comment: ZM_KV_IDAG_e2, ZM_KV_IDAG_e2, under reserve of modifications, Zimmerli Messtechnik AG, Edition: March 2010

Kv Sizing

1.50

Kv target 261.76

1.293 1.251 1.429 0.0899 0.717

kg/m kg/m kg/m kg/m kg/m

3

Kv = Cv * 0.864 Cv = Kv * 1.157 1 bar = 14.22 PSI 1 PSI = 0.07031 bar 1 bar = 0.1 MPa

Air N2 O2 H2 CH4

Zimmerli Messtechnik AG Riehen +41 61 645 98 00 [email protected]

1 MPa = 10 bar

Calculation acc. to Calame a. Hengst


Only for gases Only for mid-range pressure regulator PR, PPR and reflux blocking valve PRR 1st step: Enter all known application / process parameters first Kv results upon completion

Seat Kv = Primary pressure p1 = Secondary pressure p2 = Differential pressure Delta p = Gas Density = Ambience/ process Temperature = Target flow Gas = Theoretically Gas = Sizing Gas =

3.00 4.000 1.000 3.000 1.251 20.0 102.000 161.084 128.867

uotat on r er ag ag ag

o: o: o: o: o:

bar absolute bar absolute bar 3 kg/m °C Nm3/h Nm3/h Nm3/h

2nd step: P1 4.000 If required, testa different Kv (seat) from the data sheet 0.000 Rule: (Kv Seat 0.000 ≥ Kv Sizing) is critical or too s

2.00

Kv values 3.00 Kv Seat 2.37

Kv Sizing 161.0838142

Result for P-series for gases


Comment: ZM_KV_IDAG_e2, under reserve of modifications, Zimmerli Messtechnik AG, Edition: March 2010

with 20% safety

3

Zimmerli Messtechnik AG Riehen

3

+41 61 645 98 00 [email protected]

Kv = Cv * 0.864

Water

1.00 kg/dm

Cv = Kv * 1.157 1 bar = 14.22 PSI 1 PSI = 0.07031 bar 1 bar = 0.1 MPa 1 MPa = 10 bar

Benzol Silicone oil Trichloretylene

0.88 kg/dm 3 0.94 kg/dm 3 1.47 kg/dm

Flow calculation acc. to Calame a. Hengst


Only for liquids Only for mid-range pressure regulator PR, PPR and reflux blocking valve PRR 1st step: Enter all known application / process parameters first Kv results upon completion

Seat Primary pressure Secondary pressure Differential pressure Liquid Ambience/ process Target flow Theoretically Sizing

Kv = p1 = p2 = Delta p = Density = Temperature = Liquid = Liquid = Liquid =

uotat on o: r er o: Tag No: ag o: ag o:

9.00 4.000 1.000 3.000 1.251 20.0 10.000 13.937 11.150

bar absolute bar absolute bar 3 kg/dm °C m3/h m3/h m3/h

2nd step: P1 4.000 If required, test a different Kv (seat) from the data sheet 0.000 Rule: (Kv Seat ≥ Kv Sizing) 0.000 is critical or too sm 2.00 Kv values 9.00 Kv Seat 8.07

Kv Sizing 483.2514425

Result for P-series for liquids



with 20% safety

Zimmerli, Inertization Reducer type Seat-ø

Kv value

LPR25 [mbar]

Back pressure type Seat-ø Kv value LPS25 [mbar]

2.0 mm 4.5 mm 7.5 mm

0.15 0.65 1.25

ZM-R15 [mbar] ZM-R25 [mbar]

18mm

6.50

ZM-B15 [mbar] ZM-B25 [mbar]

2.0 mm

0.15

4.5 mm 7.5 mm 10 mm 14 mm

0.65 1.25 2.00 2.50

ZM-R50 [mbar]

18 mm

6.50

ZM-B50 [mbar]

14 mm 18 mm 26 mm

3.00 7.00 15.00

26 mm

35.00 70.00

55 mm

ZM-R100 [mbar]

15.00

ZM-B100 [mbar]

42 mm 55 mm

70.00

Zimmerli, pressure regulator PR15 [PN40] 11 mm, Viton, EPDM 11 mm, HC, PTFE

PPR15 [PN40] 1.50 1.50

11 mm, Viton,EPDM 11 mm, HC, PTFE

2.80 4.80

17 mm, Viton,EPDM 17 mm, HC, PTFE

PR25 [PN40] 17 mm, HC, PTFE 17 mm, Viton,EPDM

PR50 [PN16]

1.50 1.50

PPR25 [PN40]

PPR50 [PN16]

2.80 4.80

Weather effects Temperature drop: VA [m3/h]

Heating: VE [m3/h]

LPR, ZM-R

LPS, ZM-B 3

3

Additional shielding gas volume flow V A [m /h], which must be supplied in case of a temperature drop. Concerns: - Outdoor tanks - without temperature insulation

Additional shielding gas volume flow VE [m /h], which must be discharged in case of heating. Concerns: - Outdoor tanks - without temperature insulation

Important for the calculation in case of a temperature drop: - Tank discharging gradient, pump output [m3/h] - Weather factor in case of uninsulated outdoor tanks

Important for the calculation of the volume flow: - Tank filling gradient, pump output [m3/h] - Weather factor in case of uninsulated outdoor tanks

0.71

-(0.52)

V A = 4.8*VB V A = Volume flow in cooling (e.g. thunder storm) [m3/h] VB = Tank volume [m3] Source: TRbF120

Example:

0.89

VE=0.17*(H/D) *VB VE = Volume flow due to warming [m3/h] 3]

VB = Tank volume [m H = Tank jacket height [m] D = Tank diameter [m] Source: TRbF120

Example:

3

3

3

3

VB [m ]

VA [m /h]

VB [m ]

H [m]

D [m]

VE [m /h]

105

130.703

105

5

3

8.202


Comments concerning ressure reducin valve

Comments concerning ressure relief valve

LPR, ZM-R

LPS, ZM-B

Always choose a Kv value which is sufficiently high and, if possible, never chose the Kv value which is too low.

Always choose a Kv value which is sufficiently high and, if possible, never chose the Kv value which is too low.

Important for the calculation of the volume flow: 3

- Tank discharge gradient, pump output [m /h] - Weather factor in case of uninsulated outdoor tanks 0.71

Important for the calculation of the volume flow: 3

- Tank filling gradient, pump output [m /h] - Weather factor in case of uninsulated outdoor tanks -(0.52)

0.89

V A = 4.8*VB

VE=0.17*(H/D)

V A = Volume flow in case of cooling (e.g. thunder storm)

VE = Volume flow due to warming [m /h]

3

*VB

3

[m /h]

If the Kv indication states too high and the selection of the next lower Kv states too low, always select the higher Kv value. Attention please: The flow calculation is already designed for twice the theoretical value. Avoid further flow doubling since this might cause an unfavourable control behaviour.

If the Kv indication states too high and the selection of the next lower Kv states too low, always select the higher Kv value. Attention please: The flow calculation is already designed for twice the theoretical value. Avoid further flow doubling since this might cause an unfavourable control behaviour.

PR

PPR

Starting at a pressure difference of < 3bar above the valve, the control behaviour is increasingly unlinear. The possible maximum flow quantities strongly decrease and partly amount to merely 1/10 of the calculated value. In extreme cases, the flow is even 0.

Starting at a pressure difference of < 3bar above the valve, the control behaviour is increasingly unlinear. The possible maximum flow quantities strongly decrease and partly amount to merely 1/10 of the calculated value. In extreme cases, the flow is even 0.

The flow calculation in relation to the theoretical value is based on 20% safety.

The flow calculation in relation to the theoretical value is based on 20% safety.


PSV Sizing

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