Triple-eccentric Butterfly Valvesby SAMSON LEUSCH

LEUSCH SINCE 1974

Contents

2

LEUSCH since 1974

3

Special Butterfly Valves

14

Prime Quality

4

Butterfly Valves for Cryogenic Applications

16

Type LTR 43 Butterfly Valve

6

Special Butterfly Valves

20

Triple-eccentric Design of Type LTR 43

8

Ball Valves (Trunnion Design)

24

Different Seat Designs of Type LTR 43

10Special Ball Valves

26

Special Applications of Type LTR 43

11

Actuators

28

Special ESD Application of Type LTR 43

12

Everything from a Single Source

30

SAMSON LEUSCH: innovation, development, design, machining and manufacture of first-rate triple-eccentric control
and shut-off butterfly valves
At the company headquarters in Neuss, Germany, LEUSCH
produces standard valves for industrial applications as well as
versions tailored to specific customer specifications. SAMSONLEUSCH stands for German engineering and customized
manufacturing of control and shut-off butterfly valves to meet
specific customer requirements. Our valves fulfill highest
expectations.
The triple-eccentric Type LTR 43 Control and Shut-off Butterfly
Valve is the key product in our portfolio. Additionally, the productrange includes special valves, also versions fitted with integrated
handwheel gearing as well as pneumatic, hydraulic or electric
actuators.

LEUSCH was founded in 1974 and joined forces with
SAMSON in 2003. SAMSON AKTIENGESELLSCHAFT
headquartered in Frankfurt am Main, Germany is a worldwide
leader in the manufacture of expertly engineered control valves.
With subsidiaries in over 80 countries, SAMSON is represented
all across the world to assist customers on all continents. LEUSCH
customers also benefit from this network as it guarantees
worldwide sales and after-sales service for our products as well.
SAMSON LEUSCH butterfly valves are used in all majorindustrial applications, such as oil and gas, refineries, thechemical industry, seawater desalination, pulp and paper, gas
extraction and transport, power plant construction, ship building
as well as onshore and offshore technology.

3

PRIME QUALITY

The prime quality that the SAMSON LEUSCH products are
known for is based on the commitment and hard work of ourhighly skilled staff: they do their best to get better every day. Our
staff make sure that our butterfly valves are sized, configured,designed and manufactured to perfectly meet the specificcustomer requirements.
SAMSON LEUSCH butterfly valves feature high flow
capacities and an excellent control accuracy.
Quality is our tradition. To meet the high quality requirements
placed on our products, our construction and production
are based on the ISO 9001:2015, HP 0/TRD 201 quality
management systems as well as on international standards, suchas the European Pressure Equipment Directive 2014/68/EU.
All valves leaving our works have been subjected to a 100 %leak, function and quality testing procedure. Thanks to production
planning and scheduling, customers know the manufacturing
and testing status of their valves at any time.

4

The special design characteristics, the use of high-quality
materials and their specific machining make our highperformance valves suitable for extreme operating conditions,such as high and low temperatures, high pressures and otherchallenging applications.
As standard, our valves comply with strictest requirements
concerning fire safety and fugitive emissions (TA Luft, ISO 15848)
and they shut off tightly in both directions of flow.
As a modern manufacturer, SAMSON LEUSCH stands forsustainability and continuity. We use our commitment andtechnical expertise to achieve the highest level of safety,
reliability and durability with our control and shut-off butterfly
valves. Every control valve that we make is the result of decadelong experience, continuous development and compliance withthe strictest standards.

SAMSON‘s LEUSCH product line includes:
Control and shut-off butterfly valves
NPS 3 to 96 (DN 80 to 2400)
Class 150 to 2500 (PN 10 to 420)
Ball valves

NPS ½ to 60 (DN 15 to 1500)
Class 150 to 2500 (PN 10 to 420)
Three-way or four-way valves

NPS ½ to 36 (DN 15 to 900)
Class 150 to 2500 (PN 10 to 420)
Special constructions

According to customer requirements
Actuators and accessories

On request, all valves are available with soft or metal seat,with low-noise trims, and made of special materials.

Flanges,
NPS 4

Welding ends,
NPS 645

TYPE LTR 43 BUTTERFLY VALVE
Triple-eccentric control and shut-off butterfly valve

Valve size

NPS 3 to 100 (DN 80 to 2400)
Pressure rating	Class 150 to 2500 (PN 6 to 420)
Wafer, lug, double flanged, or welding ends
Metal or soft seated
Leakage class VI acc. to ANSI FCI 70-2/IEC 60534-4(EN 12266-1 Class A)
Seat of laminated 1.4404/graphiteor 316L/graphite, or special materials
Designed acc. to EN 12516, ANSI B16.34,
and API 609
Materials: C steel, stainless steel ,titanium, Hastelloy ®,Inconel®, Monel®, duplex steel, SMO, bronze,
zirconium, etc.

6Options:–– Low-emissions packing acc. to TA Luft/
ISO 15848–– Low-noise and anti-cavitation trims–– Heating jacket–– Anti-surge design–– ESD version–– Outer bearings, inner packing–– Cryogenic and high-temperature versions–– Fire-safe design acc. to API 607/ISO 10497–– Quick-closing version (< 0.5 s)–– NACE version acc. to MR0103/MR0175/
ISO 15156

Applications:–– Refineries–– LNG, cryogenics–– Petrochemicals–– Steel works–– Solar–– Compressors–– Ammonia, urea–– Chemicals–– Power plants–– Steam and gas turbines

7

TRIPLE-ECCENTRIC DESIGN OF TYPE LTR 43
Triple-eccentric design

8

The conical triple-eccentric seat of the Type LTR 43 Control
and Shut-off Butterfly Valve provides various benefits:
At the slightest rotary motion, the seal is lifted off the bodyseat, which means that there is no transition from static todynamic friction between the seat and plug.
The conical shape prevents the butterfly disk from getting
jammed.
The control and shut-off butterfly valve can be used for both
directions of flow:
FTO = flow-to-open (the medium opens the disk)
FTC = flow-to-close (the medium closes the disk)
The seat‘s conical shape ensures maximum shut-off performance even at extreme temperature fluctuations andpressure peaks.
The valves have an extraordinarily long service life since
they open and close almost without friction and mechanicalinitial breakaway torque.
Thanks to their patented disk profile (patent no. DE 10 2012
102 4720 A1), the control and shut-off butterfly valves arealso suitable for use in supercritical processes.

Triple-offset design principles:First offset:	The shaft is positioned fully in front of thefacing of the disk and seat. The result is one
continuous, uninterrupted facing. This allows
a high degree of tightness to be achieved as
there are no more transitions between disk
and shaft in the sealing area.
Second offset:	The shaft is slightly offset from the centerlineof the body. This gives the butterfly valve a
flow-to-close (FTC) and a flow-to-open (FTO)
closing direction. If the butterfly valve is installed in the standard FTC direction, the process medium helps keep the valve shut.
Third offset:	The beveled conical seat geometry prevents
friction, and thus wear and tear, when thevalve is opened or closed. The initial breakaway torques are minimized. The large
facing allows strictest leakage requirements
to be met.

9

DIFFERENT SEAT DESIGNS OF TYPE LTR 43
Triple-eccentric design

Standard series 2

Optional series 4

The seat (labyrinth seal, 4), which is protected inside thebody, and the massive seat ring (3) can be replaced as
the retaining ring (5) is removable.
Best solution for critical applications, such as control tomeet strict leakage requirements

Only the seat ring (labyrinth seal, 3) can be replaced.
The body seat comes with a Stellite® armor for better
wear protection
Main application for manual, non-critical service
Optional series 5

Optional series 3

The massive seat ring (3) with optional Stellite® facing usedin the standard version can be replaced. Additionally,
the body seat comes with a Stellite® armor for better wear
protection
Preferred use in welded-in versions

Optional series 2

10

Optional series 3

The massive seat and retaining ring assembly (5) as wellas the massive seat ring (3) can be replaced.
For very high flow velocities, abrasive media and highpressure drops

Optional series 4

Optional series 5

SPECIAL APPLICATIONS OF TYPE LTR 43
Triple-eccentric control butterfly valves

Type LTR 43 Control Butterfly Valve,

NPS 24, Class 150 with low-noise andanti-cavitation trims
Exchangeable partial attenuation plates
Anti-surge trim design
Metal seatedSeat and seat ring with Stellite® facing
With double-acting DR 10000-A actuator andType 3730-5 Electropneumatic Positioner
with FOUNDATION™ fieldbus communication
Type LTR 43 Control Butterfly Valve,

NPS 16, Class 300 with low-noise andanti-cavitation trims
With downstream silencer including
perforated attenuation plates in the outlet
Metal seatedSeat and seat ring with Stellite® facing
With single-acting actuator (air-to-open) andelectropneumatic positioner

11

SPECIAL ESD APPLICATION OF TYPE LTR 43
Triple-eccentric shut-off butterfly valvesFire protection/enclosure

12ESD (Emergency Shutdown) butterfly valve

Metal seated, fire-safe certification according to API 607
Pneumatic (double-acting or single-acting) actuatorOptions:–– Fire resistance of actuator and accessories according to UL 1709–– Manual or automatic partial stroke test (PST)–– Switching cabinet for remote or on-site operation–– Reservoir for emergency air supply–– Emergency manual override

13

SPECIAL BUTTERFLY VALVES

14

Control butterfly valve, NPS 64, Class 300

Type LTR 43, wafer style
Metal seatedWith single-acting actuator (air-to-close)
and Series 3730 Electropneumatic Positioner

Control butterfly valve, NPS 20, Class 1500

Type LTR 43, with flanged ends
Metal seatedWith single-acting actuator (air-to-open),manual hydraulic pump,and Series 3730 Electropneumatic Positioner

15

BUTTERFLY VALVES FOR CRYOGENIC APPLICATIONSTop-entry butterfly valve

Type LTR 43, with welding ends
Can be serviced while installed in the pipeline
Cryogenic extension bonnet (–196 °C)
Metal seatedWith single-acting actuator (air-to-close)
and Type 3730-3 Electropneumatic Positioner
with HART® communication

Shut-off butterfly valve, NPS 16, Class 900

Type LTR 43, with flanged ends
Cryogenic extension bonnet (–196 °C)
Metal seated
Leakage class VI
With single-acting actuator including damping system
Less than 0.5 s stroking time16Butterfly valve

Type LTR 43, with welding ends
cryogenic extension bonnet (insulating section)
for cryogenic service (–196 °C)
including cold-box flange

17

BUTTERFLY VALVES FOR CRYOGENIC APPLICATIONSCryogenic testing: test setup

1
2
3
4
5
6
7
8

18

Insulated tank (filled with liquid nitrogen)Pressure-reducing valve on the helium tank with indicators
Five-way valve
Pressure indicator at the valve inlet (digital and analog)
Temperature indicators inside and on the valve bodyPressure indicator at the valve outlet (digital and analog)
Leakage meter
Temperature indicator for ambient temperature (as reference)AIR LIQUIDE Deutschland GmbH
IM-SCM-Bulk-Technik
Ansgar Dechesne
FI

7

6
PI

3

4
PI

2

8

TI

Flow diagram FE-test / body pressure test / seat leak test

TI

5

1

19

SPECIAL BUTTERFLY VALVESShut-off butterfly valve, NPS 20, Class 600

Type LTR 43, with welding ends
Metal seatedSeat with Stellite® facing
With single-acting actuator (air-to-close)Shut-off butterfly valve withheating jacket
Type LTR 43, wafer style or double-flanged version
Metal seated20Anti-surge butterfly valve, NPS 24, Class 300

Type LTR 43, with flanged ends
With low-noise trim for start-up service
With outer bearings and inner packing
With single-acting actuator (air-to-open)
and Series 3731 Electropneumatic Positioner (Ex d)

21

SPECIAL BUTTERFLY VALVES

Control butterfly valve, NPS 48, Class 150

with low-noise trim and silencer
The patented low-noise components for Type LTR 43
are effective, reliable and cost-effective solutions tominimize noise emissions, cavitation and erosion.
The components can be adapted to the specificoperating conditions and retrofitted on existing
butterfly valves.
With flanged ends
Metal seatedWith double-acting actuator and reservoir for
emergency air supply
Shut-off butterfly valve, NPS 54, Class 150

Type LTR 43, with flanged ends
Metal seated
Leakage class VI
With single-acting actuator
including damping system
Less than 1 s stroking time22

SPECIAL BUTTERFLY VALVES
Centric control butterfly valves

The Type LAS centric, step-seated butterfly valves

and theType LDS swing-through butterfly valves are mainly used forcontrol applications.

The step-seated LAS valves come with two additionalstoprings welded into the body to minimize leakage by covering the annular clearance between the body and butterfly
disk.

They can also be used for three-way applications as alinked system.

LAS

LDS

23

BALL VALVES (TRUNNION DESIGN)
On/off and control applications

24

Valve size

NPS 1 to 60 (DN 25 to 1500)
Pressure rating
Class 150 to 2500 (PN 10 to 420)
Flanged or welding ends
Trunnion-mounted ballSide-entry or top-entry design
Leakage class IV to VI acc. to ANSI FCI 70-2/IEC 60534-4
Seat: PTFE, stainless-steel-filled PTFE, PEEK, nylon, or Stellite®
Materials: steel, stainless steel, titanium, Hastelloy ®, duplex steel, etc.
Options:–– Low-emissions packing acc. to TA Luft–– Low-noise and anti-cavitation trims–– Heating jacket–– Anti-surge design–– ESD version–– Cryogenic and high-temperature versions

25

SPECIAL BALL VALVES

Control ball valve, NPS 16 or 24, Class 300

with low-noise (LN-TRIM) trim and
NPS 16 or 24 diffuser
Type BVL 63-LN, with flanged ends
Split-body design
Metal seatedBall valve, DN 200 or 100, PN 16

for high-temperature applications
up to 800 °C
Type BVL 63-HT
Top-entry design26ESD ball valve, NPS 16, Class 300

Top-entry design
Metal seatedWith single-acting actuatorand Series 3730 Electropneumatic Positioner
with partial stroke testing (PST) function

27

ACTUATORS
Different actuator versions

Single-acting pneumatic actuators with spring or double-acting actuators

in standard, high-temperature, or low-temperature versions
Rack-and-pinion actuators for smaller torques
Scotch-yoke actuators for higher torques28Hydraulic or electrohydraulic actuators

For high torques at low actuator weights

Electric actuators

For control or on/off applications

29

EVERYTHING FROM A SINGLE SOURCE
Control valves, actuators, and accessories

30

Control valves
Valve size
NPS ½ to 28 (DN 15 to 700)
Pressure rating
Class 150 to 2500 (PN 10 to 420)
Flanged, threaded, or welding ends
Globe, angle, or three-way valves
Metal or soft seated
Cryogenic and high-temperature versions
Options:–– Metal bellows seal–– Heating jacket–– Low-noise and anti-cavitation trims

Actuators and accessories

Double-acting and single-acting pneumatic actuators
Emergency manual override
Pneumatic or electropneumatic positioners
TROVIS-VIEW configuration software
Valve signature recorded by Type 3730-6 Positioner withpressure sensors
Boosters
Solenoid valves
Limit switches
Filter regulators

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SAMSON AT A GLANCE

STAFF

PRODUCTION SITES–– Worldwide 4,300–– Europe 3,300–– Asia 500–– Americas 200–– Frankfurt am Main, Germany 1,800–– SAMSON Germany, Frankfurt, established 1916
Total plot and production area: 150,000 m²

MARKETS–– SAMSON USA, Baytown, TX, established 1992
Total plot and production area: 9,200 m²

PRODUCTS–– Valves–– Self-operated regulators–– Actuators–– Valve accessories–– Signal converters–– Controllers and automation systems–– Sensors and thermostats–– Digital solutions–– SAMSON Turkey, Istanbul established 1984
Total plot and production area: 11,053 m²–– SAMSON China, Beijing, established 1998
Total plot and production area: 10,138 m²–– SAMSON India, Pune district, established 1999
Total plot and production area: 18,000 m²–– SAMSON Russia, Rostov-on-Don, established 2015
Total plot and production area: 5,000 m²–– SAMSON AIR TORQUE, Bergamo, Italy
Total plot and production area: 27,684 m²–– SAMSON CERA SYSTEM, Hermsdorf, Germany
Total plot and production area: 14,700 m²–– SAMSON KT-ELEKTRONIK, Berlin, Germany
Total plot and production area: 1,060 m²–– SAMSON LEUSCH, Neuss, Germany
Total plot and production area: 18,400 m²–– SAMSON PFEIFFER, Kempen, Germany
Total plot and production area: 35,400 m²–– SAMSON RINGO, Zaragoza, Spain
Total plot and production area: 18,270 m²–– SAMSON SED, Bad Rappenau, Germany
Total plot and production area: 10,370 m²–– SAMSON STARLINE, Bergamo, Italy
Total plot and production area: 26,409 m²

SALES SITES–– SAMSON VDH PRODUCTS, the Netherlands–– More than 50 subsidiaries
in over 40 countries–– More than 200 representatives–– SAMSON VETEC, Speyer, Germany
Total plot and production area: 27,090 m²

LEUSCH GmbH Industriearmaturen
Ziegeleistrasse 10 · 41472 Neuss, Germany
Phone: +49 2131 7699-0 · Fax: +49 2131 7699-129
E-mail: info@leusch.de · Internet: www.leusch.de2019-04 · WA328 EN–– Chemicals and petrochemicals–– Power and energy–– District heating and cooling,building automation–– General industry–– Industrial gases–– Food and beverages–– Metallurgy and mining–– Oil and gas–– Pharmaceuticals and biotechnology–– Marine equipment–– Water and wastewater–– Pulp and paper–– SAMSON France, Lyon, established 1962
Total plot and production area: 23,400 m²