Farris Engineering Valve Orifice Areas

2600 Series

2600Series

Serial # Suffix A10/A11, A14/15
Orifice Label API Effective Area Actual ASME Area
D 0.110 0.150
E 0.196 0.226
F 0.307 0.371
G 0.503 0.559
H 0.785 0.873
J 1.287 1.430
K 1.838 2.042
L 2.853 3.170
M 3.60 4.00
N 4.34 4.822
P 6.38 7.087
Q 11.05 12.27
R 16.0 17.78
T 26.0 28.94
U n/a 31.50
For Super Capacity Sizes ie > 8″ inlet please contact our offices
Coeff of Discharge : API Areas = Vap 0.953, Liq 0.724, Non Code Liq 0.64
ASME Areas = Vap 0.858, Liq 0.652
Certified for Air, Steam, Liquid Service

Farris Engineering Valve Orifice Areas

3800 Series
3800Series

Orifice Label

API Effective Area

Actual ASME Area

D

0.110

0.150

E

0.196

0.226

F

0.307

0.371

G

0.503

0.559

H

0.785

0.873

J

1.287

1.430

K

1.838

2.042

L

2.853

3.170

M

3.60

4.00

N

4.34

4.822

P

6.38

7.087

Q

11.05

12.27

R

16.0

17.78

T

26.0

28.94

A

full bore

0.719

1

full bore

1.767

2

full bore

2.953

3

full bore

6.605

4

full bore

11.50

6

full bore

26.07

8

full bore

45.66

For Super Capacity Sizes ie > 8″ inlet please contact our offices
Coeff of Discharge : Vap API Nozzle ie D-T = 0.954
Vap Full Bore ie # 1 – # 8 = 0.801
Liq API Nozzle ie D -T = 0.869
Certified for Air and Liquid Service

Farris Engineering Valve Orifice Areas

2700 Series
2700Series
Serial # Suffix KE
Orifice Label
API Effective Area
Actual ASME Area
C
0.06
0.068
D
0.110
0.125
E
0.196
0.223
F
0.307
0.350
G
0.503
0.573
Coeff of Discharge : ASME Areas = Vap 0.878, Liq 0.676
Certified for Air, Steam, Liquid Service

 

Farris Engineering Valve Orifice Areas

6400/6600 Series
6400Series
Serial # Suffix S3 / T3
Orifice Label
API Effective Area
Actual ASME Area
D
0.110
0.150
E
0.196
0.225
F
0.307
0.371
G
0.503
0.559
H
0.785
0.873
J
1.287
1.430
K
1.838
2.042
L
2.853
3.170
M
3.60
4.00
N
4.34
4.822
P
6.38
7.087

For > 4″ inlet please contact our offices

ASME Section I & VIII Certified
Call for sizing assistance. 

Farris Engineering Valve Orifice Areas

1890, 1890L Series
1890Series
Serial # Suffix M
Inlet Size
Vapor
Liquid
1/2
0.089
0.077
3/4
0.089
0.077

Coeff of Discharge : Vap Kd = 0.953

Liq Kd = 0.755 (Use ASME Code Liq Equation)

Certified for Air, Steam, Liquid Service

Farris Engineering Valve Orifice Areas

1896M, 1896ML Series
1896Series
Serial # Suffix MA
Inlet Size
Vapor
Liquid
1/2
0.089
0.077
3/4
0.089
0.077

Coeff of Discharge : Vap Kd = 0.953

Liq Kd = 0.755 (Use ASME Code Liq Equation)

Certified for Air, Steam, Liquid Service

 

Farris Engineering Valve Orifice Areas

2850 Series
2850Series
Serial # Suffix R4
Inlet Size
Vapor
Liquid
3/4″
0.164
0.098
1″
0.281
0.173
1 1/2″
0.657
0.390

Coeff of Discharge : Vap Kd = 0.953

Liq Kd = 0.64 (Use Non Code Liq Equation)

Certified for Air and Steam Service

Farris Engineering Valve Orifice Areas

2856 Series
2856Series
Serial # Suffix E1
Inlet Size
Vapor
Liquid
3/4″
0.164
0.098
1″
0.281
0.173
1 1/2″
0.657
0.390
2″
1.048
0.691

Coeff of Discharge : Vap Kd = 0.953

Liq Kd = 0.64 (Use Non Code Liq Equation)

Certified for Air and Steam Service