CT 273/US
PRESSURIZED ORIFICE FITTINGS
FIOMASTER
All the component parts of the Pietro Fiorentini pressurized orifice fittings have been designed to guarantee full efficiency over the life of the
product. Precision machining on CNC machines and strict quality control guarantee a consistent high quality product.
2
Fig.
930
All Pietro Fiorentini “FIOMASTER” pressurized oriifice fittings are designed and manufactured to current ISO 5160/API/AGA 14.3 standards.
3
COMPONENT PARTS PRESSURIZED ORIFICE FITTINGS Fig.
52
4
930
94
212
15
182
213
27
183
241
21
24
9
210
185
317
64
46
231
71
316
159
ROLLER BEARING
186
6
314
188
315
WITH BALL JOINT
ND 16” through 24”
234
26
13
Hole for exhaust gas
235
SAFETY WASHER
CUT WAY
Y-Y
BLEED VALVE POS. 210
4
7
8
COMPONENT PARTS PRESSURIZED ORIFICE FITTINGS Fig.
230 232 233 237
75 211
930
178 179 180
ND
2” through 6”
181
OPEN POSITION
201
216
5
31
65
46
38
194
191
SAFETY STOP
217
46
18
199
189
215
46
193
190
14
240
192
Y
1
Y
201
CLOSED
95
OPEN
214
207
206
204
ND 2” through 14”
Plug valve open position
Plug valve closed position
208
205
203
PLATE CARRIER ALIGNMENT
EQUALIZER VALVE
5
THE SAFETY STOP AND INDICATOR PLATE
CLEARLY SHOW PLUG VALVE POSITION
INSIDE THE BODY.
Fig.
COSTRUCTION MATERIALS
POS.
1
4
5
6
7
8
9
13
14
15
18
20
21
24
26
27
31
38
46
52
64
65
71
75
94
95
159
178
179
180
181
182
183
185
186
187
188
189
190
191
192
193
194
199
200
201
203
204
205
206
207
208
210
211
212
213
214
215
216
217
230
231
232
233
234
235
237
240
241
244
306
308
314
315
316
317
DESCRIPTION
MATERIALS
NOTES
BODY
STEM
BONNET
O RING
STUD BOLT
NUT
THURST BEARING
DRAIN PLUG
PLUG
CAP SCREW
CAP SCREW
SPRING
O RING
O RING
TAIL PIECE
SLEEVE
THRUST PLATE
O RING
NAME PLATE
NUT
EYEBOLT
PIN
RETAINING RING
WASHER
HANDWHEEL
SUPPORT LEGS
PIN
SCREW
BONNET
CLAMP
O RING
BUSHING RETAINER
UPPER BUSHING
DRIVE BAR
LEAD SCREW
THRUST BEARING
ORIFICE PLATE
PLUG VALVE
PLATE HOLDER
O RING
O RING
BONNET
STEM
O RING
THRUST PLATE
WRENCH HEAD
O RING
STEM
O RING
BALL
SEAT
EQUALIZER VALVE
BLEED VALVE
INDICATOR
INDICATOR BUSHING
INDICATOR NUT
CAP SCREW
STUD BOLT
NUT
BONNET
PLUG
O RING
BUSHING
SHAFT
WASHER
SCREW
PROTECTOR
SAFETY STOP
PLUG
FLOW DIRECTION
GEAR BOX
KEY
BUSHING RETAINER
BALL JOINT
O RING
ROLLER BEARING
ST 52-3 DIN 17100
AISI 410
ASTM A216-WCB
BUNA-N
ASTM A193-B7
ASTM A194-2H
CS-DRY BEARING
AISI 316
AISI 316
AISI 316
AISI 316
AISI 302
BUNA-N
BUNA-N
ASTM A105
BRONZE
PTFE
BUNA-N
INOX
ISO 898/1-6S
STEEL
AISI 4140
STEEL
ASTM A283-GrC
AISI 316+410
AISI 1035
AISI 4140
AISI 316
AISI 1035
AISI 1035
BUNA-N
AISI 304
AISI 410
AISI 316
BRONZE
CS-DRY BEARING
AISI 316+BUNA-N
AISI 410+BUNA-N
ASTM A203-B
BUNA-N
BUNA-N/PTFE
AISI 410
AISI 410+Cr
BUNA-N
PTFE
AISI 316+410
BUNA-N
AISI 420
BUNA-N
AISI 316
DEVLON
AISI 410
AISI 410
AISI 316
BRONZE
AISI 410
ISO 898/1-8.8
ASTM A193-B7
ASTM A194-2H
AISI 410
STEEL
BUNA-N
ASTM A105
BRONZE
AISI 316
AISI 316
RUBBER
AISI 316
AISI 316
AISI 316
STEEL
AISI 4140
AISI 410
STEEL
BUNA-N
STEEL
1-3
930
2
2
2
2
2
2
2
2
1-3
1
1-3
2
2
2
NOTES
1
Electroless
Nickel plated.
2
Zinc coated.
3
Alternative ISO
Fe 510.
CS Carbon steel
6
COMPONENT PARTS PRESSURIZED ORIFICE FITTINGS Fig.
189
200
20
930
187
ND 18” through 24”
VULCANIZED RUBBER
ND 2” through 16”
VULCANIZED RUBBER
CLOSED POSITION PLUG LOW PRESSURE
SPRING ENERGIZED.
194 308 306 201
CLOSED
OPEN
240
SAFETY STOP
ND 16” through 24”
GEAR OPERATED
Plug valve open position
Plug valve closed position
THE INDICATOR PLATE CLEARLY SHOW PLUG VALVE POSITION INSIDE THE BODY.
7
Fig.
OVERALL DIMENSIONS
Fig.
930-1
CLASS
930
150
WEIGHT
ND
RF
RF+BW
BW
105/8
103/4
11
111/4
121/2
13
14
15
16
183/8
191/4
221/2
2
3
4
6
8
10
12
14
16
18
20
24
D
B
2.067
4
3.068 41/2
4.026 51/2
6.065 61/4
8.071 71/2
10.136 103/4
12.090 113/8
13.250 12
❊
135/8
❊
147/8
❊
161/4
❊
193/4
E
F
H
N
P
S
R
81/4
9
93/8
113/4
123/8
133/4
161/2
191/2
211/2
241/4
251/4
271/2
51/4
63/8
73/8
101/8
123/8
141/2
173/4
191/4
191/4
247/8
261/2
311/2
145/8
161/4
18
237/8
273/8
313/4
37
421/8
471/4
507/8
561/4
633/8
4.75
6.00
7.50
9.50
11.75
14.25
17.00
18.75
21.25
22.75
25.00
29.50
6.00
7.50
9.00
11.00
13.50
16.00
19.00
21.00
23.50
25.00
27.50
32.00
45/8
51/4
6
8
91/4
103/4
13
141/4
153/8
181/8
20
22
1/8
1/8
1/8
1/8
1/8
1/8
1/4
1/4
1/4
1/4
3/8
3/8
RF
RF+BW
BW
117
152
216
374
572
814
1230
1562
2156
2706
3819
5588
106
139
196
395
550
748
1148
1364
2024
2398
3634
5478
93
123
172
324
528
682
1135
1232
1958
2189
3388
5170
Inches
LBS
1/2”NPT
DRAIN PLUG
ND 2” through 4”
Fig.
930-3
CLASS
300
WEIGHT
ND
RF
RF+BW
BW
5
10 /8
111/8
12
14
14
151/2
17
19
221/2
213/4
227/8
267/8
2
3
4
6
8
10
12
14
16
18
20
24
D
B
2.067
4
3.068 41/2
4.026 51/2
6.065 61/4
8.071 71/2
10.136 103/4
12.090 113/8
13.250 12
❊
135/8
❊
147/8
❊
161/4
❊
193/4
E
F
1
1
8 /4
9
93/8
113/4
123/8
133/4
161/2
191/2
211/2
241/4
251/4
271/2
5 /4
63/8
73/8
101/8
123/8
141/2
173/4
191/4
191/4
247/8
261/2
311/2
H
5
14 /8
161/4
18
237/8
273/8
313/4
37
421/8
471/4
507/8
561/4
633/8
N
5.00
6.62
7.88
10.62
13.00
15.25
17.75
20.25
22.50
24.75
27.00
32.00
P
S
R
6.50
8.25
10.00
12.50
15.00
17.50
20.50
23.00
26.50
28.00
30.50
36.00
5
1/8
1/8
1/8
1/8
1/8
1/8
1/4
1/4
1/4
1/4
3/8
3/8
4 /8
51/4
6
8
91/4
103/4
13
141/4
153/8
181/8
20
22
RF
RF+BW
BW
123
167
237
473
651
864
1383
1705
2574
3165
4316
6402
112
149
213
433
600
770
1298
1452
2450
2882
3949
5841
99
132
193
369
550
704
1184
1350
2167
2607
3654
5544
Inches
LBS
3/4”NPT
DRAIN PLUG
ND 6” through 10”
Fig.
930-6
CLASS
600
WEIGHT
ND
2
3
4
6
8
10
12
14
16
18
20
24
RF
RF+BW
105/8
14
131/4
16
171/2
1813/16
201/16
203/4
23
263/4
28
321/2
BW
D
B
2.067
4
3.068 41/2
4.026 51/2
6.065 61/4
7.981 71/2
10.020 103/4
11.938 113/8
13.125 12
❊
135/8
❊
147/8
❊
161/4
❊
193/4
E
F
H
N
P
S
R
81/4
9
93/8
113/4
123/8
133/4
161/2
191/2
211/2
241/4
251/4
271/2
51/4
63/8
73/8
101/8
123/8
141/2
173/4
191/4
191/4
247/8
261/2
311/2
145/8
161/4
18
237/8
273/8
313/4
37
421/8
471/4
507/8
561/4
633/8
5.00
6.62
8.50
11.50
13.75
17.00
19.25
20.75
23.75
25.75
28.50
33.00
6.50
8.25
10.75
14.00
16.50
20.00
22.00
23.75
27.00
29.25
32.00
37.00
45/8
51/4
6
8
91/4
103/4
13
141/4
153/8
181/8
20
22
1/8
1/8
1/8
1/8
1/8
1/8
1/4
1/4
1/4
1/4
3/8
3/8
Inches
RF
RF+BW
BW
129
180
286
532
803
1089
1647
1969
2849
3865
5192
7436
119
163
253
462
690
915
1469
1716
2600
3388
4367
6578
106
147
222
374
594
814
1295
1463
2310
2915
4008
6270
1”NPT
LBS
DRAIN PLUG
ND 12” through 24”
❊ To be specified by purchaser.
Line Bore tollerances “D”
10 - inch sizes and smaller ± .0019685”
12 - inch sizes and larger ± .0031496”
8
Fig.
OVERALL DIMENSIONS
930
H
F
X
B
ØD
X
RF+BW
RF
=
E
S
BW
=
1”
R
1”
ØD
Ø N ± 0.003937”
A
A
B
0.003937”
ØP
B
=
=
CUT WAY
B-B
N° 2 DOWEL PIN FLANGE ALIGNMENT AT 180° ø 0.4035”
FLANGE EXAMPLE
ØD
BODY AND TAIL PIECE ALIGNMENT
PRESSURE TAPS 1/2” NPT
CUT WAY
9
X-X
TECHNICAL DATA PRESSURIZED ORIFICE FITTINGS
Fig.
930
PRECISION VACUUM-MOLDING FROM 75-80 SHORE SYNTHETIC NITRILE RUBBER
INTERCHANGEABILITY OF ORIFICE PLATE, PERFECT TIGHTNESS AT LOW DIFFERENTIAL PRESSURE
ORIFICE PLATE
AISI 316
After vacuum-molding
the rubber, the orifice
plate surfaces in contact with the body are
finished by machining.
This operation removes
burr or any depressions
caused by shrinkage of
the rubber.
ORIFICE PLATE
AISI 316
FLOW
FLOW
ROUGHNESS OF THE
ORIFICE PLATE SURFACES.
ND 2” through 16”
API/AGA 14.3 Rep N°3
SECTION: 2.4.1
Pietro Fiorentini
ND 2” ÷ 24”
50 microinches
(1.2 Ra)
32 microinches
(0.8 Ra)
ND 18” through 24”
Temperature limits: -20° F +250° F
max (ε)
ECCENTRICITY FOR 0,75 BETA
SIZE
Dm
2
3
4
6
8
10
12
14
16
18
20
24
2.066
3.068
4.025
6.066
8.070
10.019
11.937
13.125
15.000
17.125
19.000
23.251
THREE POINTS OF CONTACT
This system enables the fitting to meet internal concentricity tolerances of the orifice plate as required by ISO
5167/API/AGA 14.3 standards.
10
API/AGA 14.3
Report N°3
Section: 2.6.2.1
0.005905
0.009055
0.011811
0.018110
0.024015
0.030315
0.036220
0.045275
0.057086
0.070078
inches
(β)
Pietro Fiorentini
0.005905
0.007874
0.009842
0.011811
0.013779
0.015748
0.017716
0.019685
0.021653
0.023622
0.027559
0.031496
API/AGA 14.3 Report N°3
Section: 2.6.2.1
ECCENTRICITY (ε)
εmax =
0.0025 Dm
0.1+2.3 (βmax)4
where:
ε
max Allowable plate bore
eccentricity measured parallel
to the axis of the pressure taps;
Dm is the mean bore diameter;
β
max is the maximum beta
ratio of the diameters used.
TECHNICAL DATA PRESSURIZED ORIFICE FITTINGS
Fig.
930
ROUGHNESS OF INTERNAL BODY SURFACES
Body bore diameter
D
X
gap
B
Seal diameter
ORIFICE PLATE
API/AGA 14.3 Report N°3
SECTION: 2.5.1.1
Pietro Fiorentini
ND 2” ÷ 24”
300 microinches per Beta ≤ 0.6
200 microinches per Beta > 0.6
63 microinches per Beta ≤ 0.75
(1.6 Ra)
API/AGA 14.3 Report N°3 - SECTION: 2.5.1.4
The orifice plate surfaces ‘B’ must not protrude into the bore ‘D’.
SEALING
API/AGA 14.3 Report N°3 - SECTION: 2.5.1.4.2
BODY FITTING
➀➁
In all Pietro Fiorentini pressurized orifice fittings, the distance ‘X’ is less
than 0.25 inches.
TEST PRESSURE IN ACCORDANCE TO
HYDROSTATIC TEST
➀ BODY AND BONNET
API 6D
PNEUMATIC TEST
➁
BODY
BODY AND BONNET
psi
psi
150
425
80
2.9
300
1100
80
2.9
600
2175
80
2.9
➂
➀➁
BODY
PLATE
psi
The test pressures listed are NOT valve operating pressure ratings.
➀
➂
CLASS
BLIND ORIFICE PLATE
STRESS ANALYSIS FINITE ELEMENTS
11
CONSTRUCTION ADVANTAGE OF PRESSURIZED ORIFICE FITTINGS Fig.
930
STEM HOLE LOCKABLE WITH WIRE AND SEAL
WIRE AND SEAL
After fitting the Pietro Fiorentini pressurized orifice fittings, it is possible to lock
the stem with the wire and seal to prevent tampering with the concentricity of
the orifice plate inside the body.
PRESSURE TAPS
ORIFICE PLATE
BLOWHOLE AND CRACK
CAST VERSION
PIETRO FIORENTINI FORGED SOLUTION
It is quite common in the cast version for there to be blowholes or internal cracks
in the wall of the body and these cannot be detected in final testing.
If they are communicating, these casting defects falsify the control signal in the
pressure taps and change the quantity of gas passing through the orifice plate.
The body of the Pietro Fiorentini pressurized orifice fittings is constructed of
forged steel. This particularly innovative version eliminates the casting
defects and makes inspection of the material by ultrasonic or X-rays more
secure before machining.
12
CONSTRUCTION ADVANTAGE OF PRESSURIZED ORIFICE FITTINGS Fig.
CORROSION
GASOLINE
930
GASOLINE
UNPROTECTED SURFACES
ELECTROLESS NICHEL-PLATED
PROTECTED SURFACES
CAST VERSION WITH UNPROTECTED SURFACES
ENP - PIETRO FIORENTINI SOLUTION
In many cases during operation, various materials deposits on the bottom of
the orifice plate of the pressurized orifice fittings. This liquid corrodes the surfaces and solidifies over time. For this reason, other manufacturers recommended operating the pressurized orifice fittings every month or so as not to
let the gasoline solidify which would make it difficult to extract the orifice
plate.
Pietro Fiorentini has solved this problem by deploying electroless nickel-plating
the body of the pressurized orifice fittings so as to protect all the surfaces, particularly the sealing ones, from corrosion. In this case, when the foreign substance
solidifies, it does not stick to the electroless nickel-plated surfaces of the body or
make it difficult to extract the orifice plate.
13
ASSEMBLY DETAILS PRESSURIZED ORIFICE FITTINGS
Fig.
930
LEFT HAND OPERATION
RIGHT HAND OPERATION
FLOW
REVERSE FLOW
14
ASSEMBLY DETAILS PRESSURIZED ORIFICE FITTINGS
Fig.
HOW PIETRO FIORENTINI BUILDS THE MEASURING BRANCH
The diameter and depth of the gauge of the orifice fittings do not easily facilitate the
internal grinding of the weld. For this reason, the orifice fittings is not welded on the
mating pipe. This protects the inside of the orifice fittings from any burr, slag or deposit, etc. when grinding the inside of the welding.
Disassemble the end of the orifice fittings and weld it on the mating pipe. Carefully
grind the inside surface of the pipe so as to follow the tolerances of in ISO/API/AGA
14.3 standards.
X-ray control of the weld will be more practical and manageable.
GRIND THE INTERNAL WELD
2-CENTRING PINS Ø 0.393” x 17/8” LENGHT (VERTICAL POSITION)
15
GRIND THE INTERNAL WELD
930
A
94
FIOMA
TO REMOVE ORIFICE PLATE
OPERAT
CLOSED
A ROTATE TO X (INDICATOR) Pos. 94
Pos. 240
B PULL
ROTATE TO CLOSED
C CLOSE
Pos. 208
D OPEN
Pos. 210
E LOOSEN
Pos. 178
F REMOVE
Pos. 180-179
G ROTATE TO OPEN
B C
Pos. 201
Pos. 94
PLUG VALVE
EQUALIZER
B C
201
201
240
240
208
ND 2” through 14”
208
ND 16” through 24”
E F
D
179
180
178
210
Bleed internal pressure completely.
16
94
G
Fig.
930
94❊
10628 Rockley Road
Houston, Texas 77099 (USA)
AA
Check the bonnet O-Ring
Screw and washer
ASTER
180
ION
OPEN
OPEN
CLOSED
INDICATOR
AA ROTATE TO X (INDICATOR)
BB REPLACE
DD CLOSE
EE OPEN
179
Pos. 179-180
CC TIGHTEN (14 ft · Lbs) max
BLEEDER
Pos. 94
178
Pos. 178
Pos. 210
Pos. 208
Pos. 240
FF PULL
ROTATE TO OPEN
Pos. 201
GG ROTATE TO CLOSED
❊ Do not rotate plate holder onto plug valve.
Pos. 94
Note: Cover the bonnet opening with a protective sheet before assembling the screw and washer.
BB
CC
DD
178
210
179-180
GG
EE
94
EE
FF
201
FF
201
240
240
208❊
208❊
❊ Open and wait for few minutes.
ND 2” through 14”
17
ND 16” through 24”
CT 273/US
LIMITED WARRANTY
Seller warrants the Goods to be free from defects in materials manufactured by Seller and in Seller’s workmanship for a period of one (1) year from
the date of shipment by the Seller (the “Warranty Period”). Resale goods and those products incorporated into the Goods shall carry only the warranty extended by the original manufacturer to the original purchaser.
THIS LIMITED WARRANTY (A) IS IN LIEU OF, AND DISCLAIMS AND EXCLUDES, ALL OTHER WARRANTIES, STATUTORY, EXPRESS OR
IMPLIED, INCLUDING, WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, OR
OF CONFORMITY TO MODELS OR SAMPLES; (B) does not apply to any Goods which have be (i) repaired, altered or improperly installed, (ii)
subject to improper use or storage, (iii) used or incorporated with other materials, or equipment, after Buyer or anyone using the Goods, has, or
reasonably should have, knowledge of any defect or nonconformance of the Goods, or (iv) manufactured, fabricated or assembled by anyone other
than the seller; (C) shall not be effective unless Buyer notifies Seller in writing of any purported defect or nonconformance within thirty (30) days
after Buyer discovers or should have reasonably discovered such purported defect or nonconformance; and (D) shall only extend to Buyer and not
to any subsequent buyers or users of the Goods. Buyer shall provide Seller access to the Goods to which Buyer claims purported defect or nonconformance; upon request by Seller, Buyer shall at its own risk and expense, promptly return the Goods in question to Seller’s Plant. Seller shall,
at its option, promptly repair or replace F.O.B. point of manufacture, that portion of the Goods found by Seller to be defective. Goods repaired and
parts replaced during the Warranty Period shall be in warranty for the remainder of the original Warranty Period. A letter signed by an officer of
Seller can only modify this warranty.
10628 Rockley Road - Houston, Texas 77099 (USA) • Tel. 832-328-3403 - Fax 832-328-3853 • fiorentini@penn.com
Printed 04/01
The specifications and drawings are indicative and not binding. We reserve the right to make changes without prior notice.