SAMSON 82.7

Double – Eccentric Rotary Plug Valve

SMART IN FLOW CONTROLFEATURES AND BENEFITS

Positioners andAccessories
VSAMSON accessories
designed for directattachment

V

NAMUR dimensions foreasy attachment of thirdparty positioners andaccessories

Longer Service Life
V

Only the highest grade
materials are used for all
internal components toensure the longest possible
service life

Various Actuator Options
V

Spring-return diaphragm forthe most accurate control

V

Rack and pinion for lowweight, compact designV

Scotch yoke for maximum
shut-off against highdifferential pressuresMaximum Flow Capacity
Less Flow Disturbance
VThanks to the free flow
path when open, there isless turbulence in the flow
and therefore reduced
noise as well as less wear
and tear on the internaland guiding parts

V

The straight-through flow
path allows for muchhigher flow capacities(CV) than standard globe
control valves

VThis also allows fora higher rangeabilityof up to 200:1

SPECIAL APPLICATIONS

Cavitation and FlashingSpecial Trims for Noise Reduction

INDUSTRIES: All

INDUSTRIES: All

CHALLENGES: Severe damage caused by thefollowing phenomena;

CHALLENGES: High pressure drops in gaseous/vapor flow or cavitation in liquid flows can oftencause severe noise emissions, particularly as flow
rates get higher.

VCavitation: Formation of vapor bubbles in aliquid flow during throttlingVFlashing: Phase change from liquid to vapor
during throttling

SOLUTION: SAMSON offers several low-noiseand anti-cavitation options to reduce the soundpressure level (SPL) of the valves.

NACE / Sour Gas Service
INDUSTRIES: Oil & Gas, Refineries
CHALLENGES: When oil and gas are firstrecovered, hydrogen sulfide (H2S) may be present,
which can cause hydrogen-induced cracking incertain metals.
SOLUTION: The 82.7 NACE version uses only
materials in compliance with NACE MR0175/ ISO15156 specifications certified for use with H2S.
SOLUTION: The straight-through flow path aswell as the use of high-quality trim and guiding
materials allow the 82.7 to withstand the effectsof these phenomena and continue to offer
superior service life.

Fire Safe

Cryogenics

INDUSTRIES: Oil & Gas, Chemical &Petrochemical, Refineries, Steel plants

INDUSTRIES: Oil & Gas, LNG, Industrial gas
production, Refineries, Food & Beverage

CHALLENGES:CHALLENGES: Extremely low temperatures,
typically below -238 °F (-150 °C), can push thematerial properties to their limits and posemany additional leakage challenges that would
not exist at standard operating temperatures.

V

Increased risk of fire in certain areas

VControl valves must be able to withstand fire
without catastrophic failure

SOLUTION: The 82.7 is fire-safe certified
according to API 607 and ISO 10497 for use inthese areas.

SOLUTION: The strict machining tolerancesand high-quality materials used in the 82.7 allowthe valve to function as designed, even in low
temperatures down to -320 °F (-196 °C).
In addition, the 82.7 has been typetested
and certified according to EN 1626 for use incryogenic applications.

DESIGN ADVANTAGESROTARY PLUG VALVESVThe plug is rotated in and out of the flow path
to control either the flow rate passing throughthe valve or the downstream pressureV

Rotary plug valves are typically used forthrottling service due to their excellent control
abilities; however, they may also be used forisolation (on/off) applications requiring tightshut-offV

Different types of pneumatic actuators, electricactuators, or manual hand-wheels/gears may be
used to operate the valves

DOUBLE-ECCENTRIC DESIGNVThe plug shaft is offset from the centerline of the valve

VThe face of the plug is offset from the centerline of the plug shaft

DESIGN BENEFITS OF A DOUBLE-ECCENTRIC ROTARY PLUG VALVE
V

Eliminates friction when the valve is opening or closing

V

Reduces wear on internal parts

V

Reduces the required breakaway torqueV

Allows for more accurate control than other rotary valve types

TECHNICAL DETAILS

Valve Size

NPS 1 to 12

Pressure Rating

ANSI Class 150 and 300

End Connections

RF FlangedMaterials

VCarbon Steel (A216 WCC, A352 LC3)V

Stainless Steel (A351 CF8M)

V

Special Materials (Monel, Hastelloy C, Duplex, etc.)

Temperature Range-320 to +1022°F (-196 to 550°C)

Internal Leakage Rate
(According to ANSI/FCI 70-2)

V

Class IV: Metal Seat

V

Class VI: Soft Seat

Face-to-Face Dimensions

ANSI/ISA S75.08.02 (IEC 60534-2-3)

The SAMSON product portfolio offers engineered
solutions from a single source. With our extensive rangeof valves, actuators, and accessories we have the rightproducts to suit your requirements.
Our linear and rotary control valves are carefully
selected and sized to ensure reliable operation with
reduced maintenance requirements. The latest in
positioner technology offers precise control, seamlessintegration into process control systems, and advanced
diagnostics to allow for predictive maintenance.
The modular design of our products allows customers
to benefit from a tailor-made solution at an affordable
cost. Furthermore, the interchangeability of spare parts
between different valve models and sizes contributes
to keeping inventory costs low.
Continuous investment in research and development
allows us to stay at the cutting edge of technology.
With over 100 years of experience and expertise, you cancount on SAMSON to provide a robust solution for yourapplication.

SAMSON Controls Inc.
4111 Cedar Blvd. Baytown, TX 77523-8588 USA
Phone: +1 281-383-3677 · Fax: 281-383-3690
www.samsoncontrols.com

contact-us@samsongroup.com

2019-07 | NA 115

SAMSON’s technology has proven its value worldwide
in a variety of industries. We are trusted in many of theworld’s most challenging applications to achieve precise
control with a high level of safety and reliability.