Kracht SPV User manual

Operation manual
BSPV0006EN
Pressure Relief Valves SPV / SPVF
BSPV0006EN_D0024980002_04
Englisch
2011-01-13

Table of Content
1General points 4
1.1 About the documentation 4
1.2 Manufacturer´s address 4
1.3 Intended use 4
2Safety 6
2.1 Safety instructions and symbols 6
2.2 Staff qualification and training 6
2.3 General safety instructions 6
2.4 Hazard statements 7
3Device description 10
3.1 General 10
3.2 Flow direction 11
3.3 Basic construction 11
3.4 Dimensions 12
3.4.1 SPV 10 (EN-GJL-300) 12
3.4.2 SPV 10 (EN-GJS-400-15) 13
3.4.3 SPVF 20 - 80 14
3.4.4 SPVF 20 - 80 Table 15
3.4.5 SPVF 50 - 80 (EN-GJS-400-15) 16
3.4.6 SPVF 50 - 80 Tabelle (EN-GJS-400-15) 17
3.5 Types of seals 17
3.6 Type key SPV / SPVF 10-80 18
4Technical data 19
4.1 General characteristics 19
4.2 Hydraulic specifications 19
4.3 Overview materials 20
4.4 pE-Q characteristic curves (at 34 mm²/s) 21
5Transport and storage 22
5.1 Transport damage 22
5.2 Transport 22
5.3 Corrosion protection 22

6Installation 24
6.1 General points 24
6.2 Connection 24
7Operation start-up 27
7.1 Preparation 27
7.2 General commissioning 27
7.3 Additional commissioning 28
8Removal 29
8.1 General points 29
8.2 Removal Valve 29
9Maintenance 31
9.1 General points 31
9.2 Unusual noises 33
9.3 Cleaning 33
9.4 Static seals 34
9.5 Screw joints 34
9.6 Damage 34
9.7 Surface temperature 34
10 Repairs 35
10.1 General points 35
10.2 Troubleshooting 35
10.3 Elimination of damage 35
10.4 Return 35
10.5 Disposal 36
10.6 Detecting and eliminating problems 36

1 General points
1.1 About the documentation
These operating instructions describe the installation, operation and mainte-
nance of the pressure relief valves, type SPV / SPVF, also referred to below
as the device.
The device is manufactured in different versions. Information about the ver-
sion concerned in the individual case can be found on the device's type plate.
The structure of the type designation and a more detailed description of the
individual series and nominal sizes can be found in the chapter 3 “Device
description” and in the chapter 4 “Technical data”.
If you have any questions about this operating manual, please contact the
manufacturer.
1.2 Manufacturer´s address
Kracht GmbH
Gewerbestraße 20
DE 58791 Werdohl
phone: [phone] / 935-0
fax: [phone] / 935-209
email: [email protected]
web: www.kracht.eu
1.3 Intended use
The SPV/ SPVF pressure relief valve is a directly-controlled slide valve for
installation in pipelines and is used to secure low-pressure hydraulic circuits
up to pmax 20 bar - in exceptional cases, 30 bar. Each maximum permissible
setting pressure is predetermined by the pressure rating in the type key. The
various seal variants and materials enable the use of different media.
The device has been designed for operation with fluids. Dry operation is not
permitted. The medium must guarantee a minimum lubrication.
Use in explosive areas is not permissible.
It must be guaranteed that the medium is compatible with the materials used
in the device (see chapter 4 “Technical data”)
The maximum permissible operating data listed in the chapter 4 “Technical
data” must always be observed.
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Deviations from the above-mentioned data and operating conditions require
express approval by the manufacturer and/or are specified on the type plate.
Type plates or other references on the device must not be removed nor made
illegible or irrecognisable.
In cases of noncompliance, all warranty claims and manufacturer responsi-
bility shall be void.
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2 Safety
2.1 Safety instructions and symbols
The safety notices in these operating instructions are marked with caution
symbols.
Non-compliance can lead to hazards for people and the device.
In addition, the safety instructions are marked with signal words. They have
the meanings as explained below:
Caution: Identification of a low risk hazard, which could lead to minor or
medium bodily injury if not avoided.
Warning: Identificationofapotentialmediumriskhazard,whichwouldlead
to death or severe bodily injury if not avoided.
Danger: Identification of an immediate hazard, which would result in death
or severe bodily injury if not avoided.
Notice: Flagging of notices to prevent property damage.
Flagging of special user tips and other especially useful or important infor-
mation.
2.2 Staff qualification and training
The staff designated to install, operate and maintenance the device must be
properly qualified. This can be through training or specific instruction. Staff
must be familiar with the contents of this operating manual.
2.3 General safety instructions
The operational safety of the device delivered is only guaranteed when it is
used for the intended purpose (see chapter 1 “General points”).
The limit values given must never be exceeded (see chapter 4 “Technical
data”).
National regulations concerning accident prevention and health and safety
at work must be observed, as well as internal regulations laid down by the
operator, even if these are not specifically mentioned in this manual.
The operator must ensure that this operating manual is accessible to the
staff responsible at all times.
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2.4 Hazard statements
DANGER
Danger through valve blocking
The incorrect adjustment of the pressure setting above the respectively
permissible pressure values can lead to the sleeve valve blocking and
cause hazardous pressure levels. Breakage can lead to parts flying around
uncontrolled or to fluids squirting out which can lead to accidents and se-
vere injuries or even result in death.
●Do not set the pressure setting higher than the respective permissible
pressure values.
●Only allow expert and technically qualified personnel to perform the
work.
DANGER
Danger through adjustment of the threaded pin or setscrew
If the threaded pin is adjusted to higher than the maximum pressure of the
respective pressure stages, uncontrollable pressure levels can arise.
Breakage can lead to parts flying around uncontrolled or to fluids squirting
out which can lead to accidents and severe injuries or even result in death.
●Screw the threaded pin or setscrew in only until the maximum pressure
of the respective pressure stage has been reached.
DANGER
Danger due to breakage or squirting fluids!
Using unsuitable connections and lines can lead to breakage. Parts flying
around uncontrolled or squirting fluids can lead to accidents with severe
injuries or even lead to death.
●Use only connections and lines approved for the expected pressure
range.
●Comply with each manufacturer's regulations.
DANGER
Danger due to breakage or squirting fluids!
Using damaged connections and lines can cause parts to fly around un-
controlled or fluids to squirt out, which can lead to accidents and severe
injuries or even result in death.
●Immediately replace damaged connections, pipes and hose lines.
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DANGER
Danger due to pressure loaded lines.
When working on pressure loaded lines, uncontrolled or squirting fluids can
lead to accidents and severe injuries or even result in death.
●Always depressurize all lines during all work on the unit and before dis-
assembly.
WARNING
Danger due to falling loads and or loads falling over!
Due to the size and weight of the device, accidents can occur resulting in
severe injuries or death during transport and shipping.
●Compliancewithapplicableindustrialsafetyrequirementsismandatory.
●Use only suitable means of conveyance and lifting tackle with sufficient
load-bearing capacity.
●Attach the lifting tackle in such a manner that it cannot slip.
●Secure the device so that toppling over and falling down is impossible.
●Always avoid jerks, impacts and strong vibrations during transportation.
●Never walk under suspended loads, never work under suspended
loads.
●To prevent damage to the device, be extremely cautious when shipping
or transporting.
●Wear suitable protective clothing.
WARNING
Danger due to hazardous fluid!
Danger of death upon contact with hazardous fluids and when inhaling va-
pours from these liquids.
●Comply with the safety data sheets and regulations on handling the
hazardous liquids!
●Collect and dispose leaks of hazardous materials so that no hazards
arise for people or the environment.
●Comply with national and international rules at the place of installation.
●Wear suitable protective clothing.
CAUTION
Danger due to hot surfaces!
When operating the device with hot media, there is a danger of being
burned and scalded when touching the hot surfaces.
●At medium temperatures above 60 °C, take measures against uninten-
ded contact.
●Wear safety gloves.
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CAUTION
Danger due to hot surfaces!
When operating the device with hot media, there is a danger of being
burned and scalded when touching the hot surfaces.
●Let the device cool off first when the medium temperature is over 48 °
C.
●Wear safety gloves.
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3 Device description
3.1 General
The SPVF pressure relief valve is a directly-controlled slide valve for instal-
lation in pipelines and is used to protect the low-pressure hydraulic circuits
up to pmax 20 bar (in exceptional cases, 30 bar) The line connection can be
made using SAE flanges (3000 psi) or Whitworth pipe threads (G).
Fig. 3.1:
Slide valve 2 is pressed through Ring-side a against Compressed spring 3,
blocking Pump connection P from Tank connection R through Diameter d.
When Operating pressure p is reached, set using setscrew 4, Slide valve 2
releases the oil flow to the tank. Spring chamber b is relieved through Hole c.
When commissioning the valve, relieve Spring chamber b using Vent screw
5 (SW 4). The valve should preferably be mounted vertical, with the setscrew
facing down. In that case, bleeding is not required.
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3.2 Flow direction
The flow direction is marked with an arrow on the device housing. It is always
implemented from connection P to connection R.
3.3 Basic construction
Tab. 3.1: Basic construction SPV / SPVF
10. Housing 80. Set screw
20. Valve piston 90. Socket head cap screw
30. Cap screw 100. Round head grooved pin
40. Spring guide 110. O-Ring
50. Compression spring 120. Sealing ring
60. Type plate 130. Union nut
70. Threaded protective cap
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3.4 Dimensions
3.4.1 SPV 10 (EN-GJL-300)
Tab. 3.2:
SPV 10 A1G 1 A .. SPV 10 B1G 1 A .. SPVM 10 A1G 1 A ..
SPV 10 C1G 1 A .. SPV 10 D1G 1 A .. SPVM 10 C1G 1 A ..
Tab. 3.3:
SPV 10 A1G 1 B .. SPVM 10 A1G 1 B ..
SPV 10 C1G 1 B .. SPVM 10 C1G 1 B ..
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3.4.2 SPV 10 (EN-GJS-400-15)
Tab. 3.4:
SPV 10 E1G 1 A .. SPV 10 E1G 1 B ..
SPV 10 K1G 1 A .. SPV 10 K1G 1 B ..
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3.4.3 SPVF 20 - 80
Tab. 3.5:
SPVF . A2F 1 A .. SPVF . A1G 1 A ..
SPVF . C2F 1 A .. SPVF . C1G 1 A ..
Tab. 3.6:
SPVF . B2F 1 A .. SPVF . B1G 1 A ..
SPVF . D2F 1 A .. SPVF . D1G 1 A ..
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3.4.4 SPVF 20 - 80 Table
Tab. 3.7:
NW 20 25 32 40 50 80
SAE-Flange 3/4" 1" 1 1/4" 1 1/2" 2" 3"
Thread R G 3/4 G 1 G 1 1/4 G 1 1/2 G 2 G 3
A47,6 52,4 58,7 69,9 77,8 106,4
B22,2 26,2 30,2 35,7 42,9 61,9
CM10 M10 M10 M12 M12 M16
D59 59 72 83 97 131
E70 70 79 94 102 135
F24 24 32 38 50,5 79
G20 20 20 20 20 25
H50 50 65 65 75 110
K1160 160 170 170 192 190
K2167 167 172 172 209 207
L1210 210 235 235 267 300
L2217 217 237 237 284 317
M50 55 65 65 75 110
All dimensions in mm
Tab. 3.8:
Nominal size SW1 SW2 SW3 SW4 Weight in kg
20 17 5 46 17 3,0
25 17 5 46 17 3,5
32 17 5 46 17 5,5
40 17 5 46 17 6,0
50 19 6 46 19 8,2
80 19 6 - 19 18,5
All dimensions in mm
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3.4.5 SPVF 50 - 80 (EN-GJS-400-15)
Tab. 3.9:
SPVF . E2F 1 A .. SPVF . E1G 1 A ..
SPVF . K2F 1 A .. SPVF . K1G 1 A ..
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3.4.6 SPVF 50 - 80 Tabelle (EN-GJS-400-15)
Tab. 3.10:
NW SAE Flange Thread
RA B C D E F H K1L1L3M
50 2" G 2 77,8 42,9 M12 124 102 50,5 75 192 267 274 75
80 3" G 3 106,4 61,9 M16 176 135 79 110 190 300 307 110
All dimensions in mm
Tab. 3.11:
Nominal size SW1 SW2 SW3 SW4 Weight in kg
50 19 6 46 17 8,2
80 19 6 - 19 18,5
All dimensions in mm
Production of the housing in version types "E" and "K" in the nominal sizes
20, 25, 32 and 40 has been changed from solid material to raw parts. The
castcontourscorrespondto theversionmadeofEN-GJL-300(for dimensions
see section 3.4.4 “SPVF 20 - 80 Table”)
3.5 Types of seals
There are 4 types of seal available:
Tab. 3.12:
Material
NBR Standard version up to 80 °C
FKM Version up to 150 °C
Copper High-temperature version up to 220 °C
Soft iron Maximum-temperature version up to 350 °C
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3.6 Type key SPV / SPVF 10-80
Tab. 3.13: Ordering example SPV / SPVF 10-80
SPVF (M) 25 A 2F 1 A 12
1. 2. 3. 4. 5. 6. 7. 8.
Tab. 3.14: Explanation type key SPV / SPVF 10-80
1. Product code
SPV NG 10
SPVF NG 20 - 80
2. Installation (on request)
MConsole integration (A and C possible)
3. Nominal size
10 20 25 32 40 50 80
Qmax= 40
l/min Qmax= 90 l/min Qmax= 90 l/min Qmax= 450 l/min Qmax= 450 l/ min Qmax= 550 l/ min Qmax= 800 l/ min
4. Version
AStandard version NBR to 80 °C
BHigh temperature version to 220 °C
CFKM version to 150 °C
DSoft-iron gasket to 350 °C
EGJS housing NBR
KGJS housing with FKM seal
5. Line connection type
2F SAE flange 3000 psi
1G Threaded connection
6. Construction code (internal assignment)
7. Actuation type
ASetscrew
BTwist grip (on request)
8. Pressure range (pressure ratings)
02 05 07 12 20 25 30
0,5 ... 2.5
bar 2 ... 5 bar 2 ... 7 bar
(only NG
20 ... 40)
4 ... 12
bar 10 ... 20 bar 19 ... 25 bar
(only NG 20 ...
50)
10 ... 30 bar
(only NG 10)
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4 Technical data
4.1 General characteristics
Tab. 4.1:
Construction Sliding piston valve - directly operated (seat on request)
Mounting in pipeline
Pipe connection SAE flange (3000 psi) / Whitworth thread G
Dimensions See chapter 3 “Device description”
Weight See chapter 3 “Device description”
Installation position Pressure set screw facing down
Housing material EN-GJL-300 ( EN-GJS-400-15)
Actuation type mechanical set screw/knob
Accessories Welding flange SAE (3000 psi)
∆p-Q-characteristics See section 4.4 “pE-Q characteristic curves (at 34 mm²/s)E”
Hydraulic oils Hydraulic oils according to DIN 51 524 / 25
(other media on request)
4.2 Hydraulic specifications
Tab. 4.2:
Nominal size 10 20/25 32/40 50 80
max. flow capacity l/min 40 90 450 550 800
Nominal pressure bar 30 25 25 25 20
Pressure setting range pv min bar 0,5 0,5 0,5 0,5 0,5
pv max bar 30 25 25 25 20
Fluid temperature range Tm min °C -20 -20 -20 -20 -20
Tm max °C 80 (220) 80 (220) 80 (220) 80 (220) (220)
Ambient temperature Tu min °C -20 -20 -20 -20 -20
Tu max °C 60 60 60 60 60
Viscosity min mm2/s 6
max mm2/s 600 (standard)
max mm2/s 1500 (possible) at Qmax= 50% QNand at pmax= 75% pN
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4.3 Overview materials
Tab. 4.3: Materials SPV / SPVF
Housing See section 3.6 “Type key SPV / SPVF 10-80”
Valve piston 16MnCrS5
Cap screw 9 SMnPb 28
Spring guide 15 S20K
Compression spring Spring steel C
Type plate Al 99.5
Threaded protective cap Polypropylene
Set screw Steel
Socket head cap screw Steel
Round head grooved pin Al 99.5
O-Ring See section 3.6 “Type key SPV / SPVF 10-80”
Sealing ring Copper
Union nut Steel
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