INDUSTRY SOLUTIONS
APPLICATION-SPECIFIC BALL VALVES
Our industry solutions
Why do we have just the right product for you? Because
we can offer a very large number of standardised solutions and an unlimited number of individual solutions.
We supply high-quality ball valves and valves at reasonable prices – including branch competence in the automotive industry, building and agricultural machinery, fire
protection, renewable energy, ship building & offshore
applications, mining and tunnel drilling, oil and gas as
well as the steel & chemical industry.
For all of these branches of industry, we give you the good
feeling that you have acquired a safe, first class product.
Marine & Offshore
Firesafe ball valves
spring washer
graphite rings
metallic sleeve
spring washer
When handling flammable liquids, safety must be a prime consideration. Great importance is therefore attributed to the design of “fire-safe” shut-off valves utilized in many
industrial environments including:
•
chemical and petrochemical plants
•
oil drilling and refineries
•
on- /offshore installations
When fire does break out, it is important that it does not spread through failures in pipework systems. Even under the most extreme conditions shut-off valves must provide:
•
secure operation
•
reliable sealing in shut-off position
•
reliable sealing to the outside
Due to their quarter turn shut-off design, MHA ball valves provide a solution to meet these
demands. Metal seat edges at the ball seats guarantee the sealing function during and
after contact with fire, even if the seals are burnt. In addition, both housings and shafts are
sealed with heat resistant seats, ensuring their continued operation.
MHA ball valves of the BKH- and KH-series have been tested successfully according to
firesafe standard ISO 10497. Currently MHA is certified for the BKH series with nominal
sizes from DN 4 to DN 50 and the KH series with nominal sizes from DN 25 to DN 125,
within a nominal pressure range up to PN 420 bar.
Marine & Offshore
Flangeable cylinder valves for e.g. riser tensioner system
• Sizes from 5/8“ to 8“ (DN15 to 200)
• Pressure up to 10.000 psi (690 bar)
• Steel, stainless steel or duplex
• Bypass option
Highly corrosion-resistant bronze marine valve
CuAl10Ni
EN 1092
connection
• All metal parts made of nickel-aluminum-bronze
• 3“ (DN 80)
• 700 psi (50 bar)
• Flange connection EN 1092 (others on request)
Energy & Renewables
Maintenance ball valves for pitch systems
in windpower plants
Block-type ball valve with integrated functions
• Position feedback with sensor
• Mechanism against unintentional actuation
• Optical display of position
• Also available for offshore or low-temperature applications
Electrically-operated ball valves for
power plant hydraulics
• Electrical
• ATEX
actuator in accordance with customer specifications
certified
• Emergency
manual override
Construction & Agricultural
Excavator grab tooling valve
This valve combination is used in excavators for special tooling. Integrated safety function against overload pressure, combining ball valve, check valve and pressure relief valve
in one valve block. Robust and space optimized design with fewer potential leakage points
than piped solution.
Examples of multi-functional valve modules
Change over block for front linkage
This change over block is mainly used in agricultural equipment. Allows for manual override of equipment movement functions. Space-saving valve block design, combining two
ball valves and one check valve. The valve can be directly panel-mounted and is protected
against unintentional operation.
Oil & Gas
Ball seat design for gas applications
During opening gas can cause significant
damage to standard ball seats through
increased flow rates.
The MHA ZENTGRAF seat design with
an inner metal ring protects the ball seat
from erosion and increases the lifetime of
the ball valve significantly.
eroded ball seat
standard
seat design
MHA ZENTGRAF
gas seat design
ATEX ball valves
oxygen
explosion
ignition
source
inflammable
substance
Explosions can cause loss of life and serious injuries as well as significant damage. The aim of the ATEX
directive (94/9/EG) is both to apply a single level for health and safety requirements and to overcome trade
barriers.
The main purpose of the ATEX directive is to minimize or completely eliminate the risk of ignition in explosive areas and to limit the harmful effects in case of an explosion. Explosive atmospheres (Ex areas) can be
found where a mixture of air, flammable gases, vapors, mists or dusts are being produced, transformed or
stored in the presence of oxygen. This may, for example, be the case in power plants, refineries, chemical
facilities, paint facilities, air- and seaport storage tanks.
Some supplier declare, that their ball valves hold no potential ignition source in normal usage, and thus
do not fall under the scope of the ATEX directive. This is not our approach. All MHA ZENTGRAF ATEX ball
valves undergo a conformity evaluation procedure in accordance with the ATEX directive 94/9/EG. During
the ignition source analysis, it has been detected that trapped air in the clearance volume between body
and ball may cause an explosive atmosphere. By the use of a special sealing material, the diversion of the
electric charge can be guaranteed. This applies to all MHA ZENTGRAF ATEX ball valves of the series BKH,
MKH, KH, BK3, 3/4 KH, PKH, PK3, MPKH and BEKH.
MHA ZENTGRAF is certified for the ATEX class Ex II 2 Gc
Group II: all industries except underground mining; Category 2: Zone 1 / 21 (an explosive atmosphere is likely to occur in normal operation occasionally); Atmosphere G: gas, vapors and mists; Protection Concept c:
constructional safety
Oil & Gas
Distributor block for gas filtration stations
• Several integrated functions and ball valves in one block
• Mutual activation of two blocks
• Material suitability in accordance with NACE MR0175
• O-rings against explosive decompression and suitable for temperatures down to -46°C
Components for all CNG processing steps
Storage / compression
Transportation
Gas station
Process Industry
CO2 extraction trunnion ball valve
• Pneumatically operated
• Full trunnion ball
• ANSI flange connection (others on request)
Highest pressure ball valves
Highest pressure ball valves for applications up to 2.000 bar. Typical application fields
are water cutting machines, test benches and high pressure pumps.
• Flanged or threaded connection
• Pressure up to 2.000 bar (30.000 psi)
Process Industry
Bypass ball valve with flange connection
When larger ball valves have to be activated at full differential pressure, a smaller
ball valve is used before activation in order to equalize the pressure. We combine the
bypass and main activation in one block in order to prevent leakage points compared
to a piped solution.
Benefits
•Designed for use in harsh conditions
•Locking device to prevent unintentional activation
160
Torque level at 6.000 psi
too high for manual
actuation
Main valve DN40 (1 ½)
140
Bypass Valve DN6 (1/4)
Torque (Nm)
After pressure equalization
torque level of main valve
is reduced by 70%
-70%
120
100
80
60
40
Bypass valve easy to
operate at full pressure
20
0
6.000
3.000
Pressure (psi)
0
Mining & Boring
Process Industry
Safety bleed valve
bleed valve
main valve
Maintenance valve used for example in tunnel boring machines, allowing
for service of cylinders without shutting down the hydraulic system.
1
Separated shut off and bleed valve guarantees safe isolation of media in
accordance with DIN EN 982 with locking device for up to 3 padlocks and
bleed closed
main open
integrated on/off label.
1
Normal operating position
In this position the main valve is open and the bleed valve is closed.
2
2
Main close position
First step in locking out the hydraulic supply to the machine is to close
the main valve.
main closed
Bleed position
bleed closed
Second step is to bleed the hydraulic consumer through the bleed valve. Through the cam plate design the bleed valve can only be operated
if the main valve is closed. The possibility to lock the valve position
with up to three padlocks ensures a safe maintenance service for the
workers.
3
main closed
bleed open
3
Automotive & Chemical
(paints, lacquers, isocyanate …)
Sealing, gluing
Painting
e.g. sheet metal overlapping for
corrosion protection, windscreen,
ceiling
Typical requirement:
LABS-free (the valves can be
specially cleaned to remove
paint wetting disruptive
substances)
Typical media:
• Polyurethane
• Thermoplastics (PVC, PA, PET)
• PVC, rubber
Protection / damping
Polyurethane (PUR)
e.g. noise protection, protective
undercoating
e.g. seat padding
Typical media:
• Isocyanate (MDI, TDI)
Typical media:
• Polyurethane
• Plastisol
• Mastic (protective undercoating)
MHA ZENTGRAF offers a wide range of suitable valve setups for different automotive
industry processes. In many cases highly viscous or abrasive fluids are used which provide major challenges for valve seat materials. For those media MHA ZENTGRAF uses
metallic ball seats with a specially hardened ball to ensure a long lifetime in the process.
MHA ZENTGRAF ball valves are also available with heating devices and temperature
sensors in order to keep the temperature regulated during the manufacturing process.
On request the valves can be specially cleaned to remove paint wetting disruptive substances (LABS-free). Equipped with actuators and limit switches our ball valves can be
integrated into any automization concept.
Ball valves for isocyanates and abrasive media
Isocyanates require a special seat setup as they react with humidity and develop
special
stem design
metallic
ball seats
crystalline particles. To prevent the fluid from coming into contact with environmental
humidity, the ball valves have to be leakproof. This is ensured through a special stem
setup.
Furthermore, some isocyanate types would damage standard plastic ball seats. That’s
why metallic ball seats are used for this application to increase the lifetime of the ball
valves.
Fire Protection
Fire protection application examples for railway,
tunnel, buildings and marine
Product range for fire extinguishing systems
• Nominal diameter: 4 - 200 mm
• 15.000 section valves per year
• Steel, stainless steel
• Manually operated or actuated (pneumatic, electric, hydraulic)
Valves can be used with typical fire extinguishing media like water mist,
argonite, nitrogen, CO2 and others.
Certificates - download on www.mha-zentgraf.com
MHA ZENTGRAF is certified according to the relevant pressure equipment directive CE and
DIN EN ISO 9001 as well as the environmental standard DIN EN ISO 14001 and carries out
acceptance procedures under the supervision of all notable classification societies such as ABS the American Bureau of Shipping, BV Bureau Veritas, CC China Classification, DNV Det
Norske Veritas, GL Germanischer Lloyd, NK Nippon Kaiji Kyokal, TÜV Technischer Überwachungsverein.
If desired, acceptance test certificates according to DIN EN 10204 3.1 and 3.2 can be issued.
MHA ZENTGRAF fulfills the requirements under code of practice AD-Merkblatt HP 0. Firesafe ball valves are supplied in compliance with BS 67SS T.2 API 6 FA and ISO 10497.
COMPANY CERTIFICATES
ISO 9001
de
en
fr
it
ISO 14001
de
en
fr
it
PED/DGRL – 97/22/EG
de
en
fr
it
AD2000 HP-0
de
en
fr
ATEX – 94/91/EG
de
en
Fire-Safe
de
en
PRODUCT CERTIFICATES
DNV Approval
en
ABS Design Approval
en
it
OTHER CERTIFICATES
EAC
UKRSEPRO
ru
ukr
About MHA ZENTGRAF
MHA ZENTGRAF - Flow Control Technology. A leading developer and manufacturer of
high-pressure ball and needle valves, with plants in Germany and China, sales offices in
India and export to more than 60 countries.
MHA ZENTGRAF specializes in fluid dynamic solutions since 1945. No matter what you
want to control, throttle or lock - we are your partner! Our high pressure ball and control
valves are used in many fields of application all over the world – choose from a standard or
individual custom-designed product.
•
DIN EN ISO 9001 and DIN EN ISO 14001 certified
•
PED 97/23/EC certified
•
Acceptance tests according to e.g., EN 12266, API 6D and certificated according to
EN 10204
•
DNV·GL type approval
•
ABS design assessment
•
Individual acceptance tests on request (e.g., LRS Lloyds Register of Shipping, NK Nippon
Kaiji Kyokai …)
•
ATEX certified (Ex II 2G c)
•
Firesafe approval in acc. to ISO 10497 and API 6FA
solution?
m
o
st
u
c
a
r
e
Aft
us now!
- Speak with
MHA ZENTGRAF GmbH & Co. KG
MHA ZENTGRAF Flow Control Technology
Ballerner Strasse 8
(Shanghai) Co., Ltd.
MHA ZENTGRAF GmbH & Co. KG
66663 Merzig
Add: T52-1 South, No. 1510, Chuan Qiao Road
RK Plaza, Survey No 206/3, Plot No. 17
Germany
Pudong, Shanghai, P.R.C. 201206
Viman Nagar, Pune-411014
Phone + 49 6861 / 7000 - 0
Phone +86 21 / 5899 2090
India
Fax + 49 6861 / 7000 - 77
Fax +86 21 / 5899 6758
Phone +91 8007 9997 96
info@mha-zentgraf.com
sales@mha-zentgraf.com.cn
info@mha-zentgraf.com
www.mha-zentgraf.com
www.mha-zentgraf.com.cn
www.mha-zentgraf.com
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