Frank V 85 User manual

11/2020
Errors and omissions excepted Plastic valves L7 – 7
Pressure relief valve type V 85 and type V 185
Example for an invitation to tender text:
Pressure relief valve type V 185, DN 50, PN 10, PVC-U / PTFE, flange connection acc. to DIN EN 1092-1 - PN 10,
adjustment range 0,5 bar to 9 bar
*) also acc. to ANSI available
1) available for type V 85, DN 65 – DN 100
Body material PVC-U PP PVDF
Material of diaphragm • EPDM 1) • PTFE with EPDM cushion
Type V 185: DN 15 up to DN 50 / PN 10 (adjustment range: 0,5 – 9 bar)
Type V 85: DN 65 up to DN 80 / PN 6 (adjustment range: 0,5 – 6 bar)
Type V 85: DN 100 / PN 4 (adjustment range: 1 – 4 bar)
Working temperatur 0 °C up to 60 °C – 10 °C up to 80 °C – 20 °C up to 100 °C
Nominal size / pressure class
Company standard
FRANK GmbH *Starkenburgstraße 1 *D-64546 Mörfelden-Walldorf
Telefon [phone] / 4085-0 *Telefax +49 (0) 6105 / 4085-270 *www.frank-gmbh.de
Document: FRANK_DB_L7_Überströmventil Typ V 85 und Typ V 185_11-2020_EN
Connection with pipe
Length
• Cement- / Welding spigot
• Flange connection acc. to DIN EN 1092-1 (replaces DIN 2501) - PN 10 (16)*)
• True union with cement- / welding socket (DN 15 – DN 50)
• True union with spigot (DN 15 – DN 50)

L7 – 8 Plastic valves 11/2020
Errors and omissions excepted
Pressure relief valve type V 85 and type V 185
Cement- / welding spigot Flange
True union with spigot
True union with cement- / welding socket
z
Ls
Lf
Ø D
L
h
Ø d
H
V 185 (DN 15 – DN 50)
L
H
Ø D
Ø d
hh2
V 85 (DN 65 – DN 100)

11/2020
Errors and omissions excepted Plastic valves L7 – 9
DN d4e1
15 8,8 50
20
25 8,8 30
32
40 8,8 50
50
Pressure relief valve type V 85 and type V 185
Dimensions and weights
Dimensions in mm Weight in kg / pc.
DN d D h h2H L
3) z 4) Lf5) L6) z 7) Lf5) Ls8)
15 20 83 20 - 137 134 160 140 158 184 168 272 0,5 0,4 0,7
20 25 83 20 - 137 134 160 140 158 184 168 278 0,5 0,4 0,7
25 32 112 27 - 199 174 200 180 198 224 210 324 1,3 0,9 1,7
32 40 165 43 - 199 174 204 180 202 232 210 334 1,3 0,9 1,7
40 50 165 43 - 290 224 258 230 256 291 266 397 6,5 4,5 8,1
50 63 165 43 - 290 244 286 250 256 298 266 380 6,6 4,6 8,3
65 75 180 45 70 275 284 - 290 284 - 296 - 8,2 6,3 14,8
80 90 200 90 95 410 300 - 310 300 - 310 - 12,8 9,5 16,2
100 110 250 70 110 485 380 - 390 380 - 390 - 22,7 19,9 33,8
3) Cement spigot 4) Union with cement socket 5) Flange 6) Welding spigot (IR or butt) 7) True union with welding socket
Dimensions and weights
for other connections
see L7 – 44
No. Description Number Material
6 Spring plate 1 Aluminum alloy
7 Adjustment screw / nut 1 A2 - 1.4301 (SUS 304)
8 Cap 1 PVC, PP
9 Screw set 1 A2 - 1.4301 (SUS 304)
10 Piston complete *,1) 1 PVC-U, PP, PVDF
1) only DN 65 – DN 100
*) Wearing parts / recommended spare parts
Functionality
By a preloaded spring with a compression piece the prefor-
med diaphragm (V 186) or the piston (V 86) is pressed against
the sealing seat of the overflow outlet. In the initial state the
overflow outlet is closed, there is no through flow. Exceeds
the system pressure acting on the diaphragm the value of the
set spring force, the overflow outlet becomes released and
the medium can drain off.
Description
Pressure relief valves V 85 and V 185 protect systems and
piping systems against overpressure and pressure peaks.
The third pipe socket (overflow outlet) integrated in the
valve body allows installation directly into the main pipe.
Flow-optimized design of the lower part results in only
a small pressure loss in the passage.
Special features
Good control characteristic
Installation independent of position
Overflow outlet directly on the valve
Type V 185 additionally:
Low maintenance due to simple construction
Entire actuator mechanism hermetically sealed from the
medium by diaphragm
Nearly dead space free body
Integrated support for plate and rail mounting
Working pressure pBin bar
Body material TB[°C]
pB[bar]
DN 10 – 50 DN 65 – 80 DN 100
PVC-U
0 up to 25 10 6 4
40 6 6 4
60 1 1 1
– 10 up to 30 10 6 4
40 7 6 4
60 4,3 3,5 2,4
80 1,7 1,3 1
– 20 up to 40 10 6 4
60 7,5 4,6 3
80 5,3 3,3 2
100 2 1 0,5
Connection for attachment
DN 15 – DN 50 (type V 185)
Ø d4x 2
e1
No. Description Number Material
1 Base plate 1 PVC-U, PP, PVDF
2 Bonnet 1 PVC-U, PP, PVDF
3 Diaphragm
*) 1 PTFE, EPDM
4 Thrust piece 1 PP
5 Pressure spring*) 1 Spring steel
PP
PVDF
PVC-U PP PVDF
PVC-U PP / PVDF
8) True union with welding spigot - For the installation length of the 3rd spigot, divide the dimensions L, Lf, Ls, z by 2 -

L7 – 10 Plastic valves 11/2020
Errors and omissions excepted
Example DN 40:
Flow: 4500 l/h
Working pressure: 6,7 bar
With the given parameters, the pressure relief valve type V 185, DN 40 shows a pressure increase of 0,7 bar and a hysteresis
of 0,3 bar.
Pressure relief valve type V 85 and type V 185
Characteristic graphs
DN 15 DN 20
DN 25 DN 32
DN 50DN 40
Working pressure [bar]
9
8
7
6
5
4
3
2
1
0
Flow rate H2O [l/h]
0 250 500 750 1000 1300
Flow rate H2O [l/h]
0 500 1000 1500 2000 35002500 3000
Flow rate H2O [l/h]
0 2000 4000 90006000
Working pressure [bar]
9
8
7
6
5
4
3
2
1
0
Working pressure [bar]
9
8
7
6
5
4
3
2
1
0
10
Working pressure [bar]
9
8
7
6
5
4
3
2
1
0
10
Flow rate H2O [l/h]
0 500 1000 22001500
Working pressure [bar]
9
8
7
6
5
4
3
2
1
0
Working pressure [bar]
9
8
7
6
5
4
3
2
1
0
Flow rate H2O [l/h]
0 1000 2000 3000 57004000 5000
Flow rate H2O [l/h]
0 2000 4000 6000 1400010000 120008000

11/2020
Errors and omissions excepted Plastic valves L7 – 11
Characteristic graphs
Pressure relief valve type V 85 and type V 185
DN 65 DN 80
DN 100
Working pressure [bar]
12
10
8
6
4
2
0
Working pressure [bar]
12
10
8
6
4
2
0
Flow rate H2O [l/h]
0 6000 12000 24000 18000
Flow rate H2O [l/h]
0 6000 12000 3600018000 24000 30000
Flow rate H2O [l/h]
0 6000 18000 54000 30000 42000
Working pressure [bar]
12
10
8
6
4
2
0

L7 – 12 Plastic valves 11/2020
Errors and omissions excepted
Notes for correct installation
Installation and operation should be performed by qualified
personnel and in compliance with all safety regulations
(eg UVV etc.) and common technical rules.
The valve must be installed stress-free in the pipeline
(plane parallelism, axial, length). If possible, use three de-
tachable pipe connections (flange or screw connection).
Flange connection:
Connecting bolts have to be tighten evenly crosswise
(observe the tightening torques of the screws). For plastic
flanges in general washers have to be provided for bolts
and nuts.
Cement / welding socket, cement / welding spigot:
For the gluing or welding connection the relevant
guidelines (e.g. DVS) have to be noted.
Before commissioning the bolt torques on the
housing must be checked and retightened if necessary.
Assembling of the valve
The valve assembly is to be performed in reverse
order to the disassembly.
Before the assembly all parts have to be checked
for damages.
All parts have to be clean.
Screws 9have to be mounted evenly and crosswise
according to the torques (see above).
After assembly carry out a pressure test acc. to
DIN EN 12266-1.
Disassembling the valve
Attention: Never dismantle the valve when the pipe is
under pressure.
Put the valve in an upright position, turn off cap 8.
Release counter nut on adjusting screw 7and turn
the screw counterclockwise until the compression
spring 5is completely relieved.
Loosen the connecting screw 9on the housing and
lift off the upper part of the valve.
Remove: spring plate 6, pressure spring 5, thrust
piece 4, diaphragm 3and piston (type V 85; s.p. L7 – 12).
Maintenance manual and mounting instructions
Pressure relief valve type V 85 and type V 185
DN 15/20 25/32 40 50 65 80 100
Md 9 12 20 20 29 29 29
Tightening torque Md
for body connection in Nm
Maintenance
The valves are nearly maintenance-free.
For heavily soiled and particle-carrying media, depending
on the degree of soiling, cleaning is recommended at
appropriate intervals.
For cleaning, disassemble the valve into individual parts
(for instructions, see „Disassembling the valve“).
Depending on the operating conditions and operating
time, various components may show signs of wear.
As spare parts we recommend: diaphragm 3,
compression spring 5, adjusting screw 7with nut.
Adjusting the working pressure
Remove cap 8, loosen lock nut.
Increace working pressure:
Turn adjusting screw 7clockwise.
Decrease working pressure:
Turn adjusting screw 7counterclockwise.
Lock adjusting screw 7 with lock nut and mount cap 8.
Disorder Cause Elimination
Leakage on the adjusting screw Diaphragm defective Replace diaphragm
Leakage between upper and lower part Housing screws loose Retighten screws acc.
table screw tightening torques
Valve does not close properly Sealing seat is dirty or damaged Clean sealing seat and check for damages
Trouble shooting
V 185 (DN 15 – DN 50)