The Sentry® AutoVREL Flow Controller allows users to automate new or existing sample panels through a well-appointed device that controls sample panel flow based on feedback from a non-contact flow meter. With the AutoVREL “smart” function, the operator only needs to set the desired sample flow and the system automatically adjusts to changes in the sample pressure.

MODEL

AV-101

BENEFITS

Power plants that frequently cycle or have sliding pressures require technicians to manually adjust the variable pressure-reducing element (VREL) in their sample panels to maintain flow and EPRI-recommended sample velocity. With reduced staff resources, there is increased interest in automating these tasks.

The Sentry AutoVREL flow controller has been developed to meet this need as an entry-level flow controller that can be used in new or retrofit installations.

The Sentry AutoVREL flow controller is a sister product to the full-featured Sentry Sample Sentry® II which offers advanced control and monitoring features.

SENTRY AUTOVREL FLOW CONTROLLER Sample Conditioning Automation

S A M P L E CO N D I T I O N I N G

Gas

Liquid & Slurry

Solid & Powder

Steam & Water

FEATURES

�� Provides quick response time during system startup

�� Can be field installed on existing sample panels

�� Simple to set and maintain desired flow

�� Displays current valve position

�� Provides feedback to plant DCS via relay

�� Can be set to display actual flow or set flow

�� Responds to feedback from a Sentry TSV (Thermal Shutoff Valve) relay for increased operator safety

�� Allows for manual operation through simple override

�� Offers easy access to the Sentry VREL for maintenance and cleaning

SampleIn2

V-2C

SC-2

Flush Water 3 2

* MT-5VMag Trap F-1

To Sink

4 1

VRELTSV-1

SC-1

Alarm toCustomerDCS

ZS-310R

M AutoVREL

FE-307

FI1

PI1

TI1

F-2MT-1 (option)

To Analyzers

To SinkBPR/RV

* MT-5V recommended in applications with high magnetite loading

Example P&ID

SPECIFICATIONSinstallation With basic hand tools by plant personnel; optional installation kit available

mounting Front side – panel only

dimensions 4.25 in w x 4.25 in h x 6.875 in d

sample temperature 60°F to 95°F (15°C to 35°C)*

ambient temperature -4°F to 140°F (-20°C to 60°C)

flow range 200-1500 cc/min ± 100 cc/min (default flow meter range)

wetted materials 316 SS

input power 24V DC; separate power supply required

enclosure rating lp 65

inputs Flow, Sentry TSV trip

outputs Visual indication of flow and setpoint; status indication relay for feedback to plant control room

user interface Four keys: Up, Down, Enter/Display, Escape/On; backlit LCD display; LED operation indicator

manual override Yes: See manual

* The AutoVREL flow controller is designed for optimum performance at EPRI-recommended value of 25°C (77°F). If normal sample temperatures fall outside of the sample temperature range, please contact your Sentry representative to discuss options.

sentry-equip.com 966 Blue Ribbon Circle North, Oconomowoc, WI 53066 U.S.A. | +1-262-567-7256 | sales@sentry-equip.com

© 2018 Sentry Equipment Corp. All rights reserved. All product and company names are property of their respective owners. It is solely the responsibility of end users, through their own testing and analysis, to select products and materials suitable for their specific application requirements, ensure they are properly installed, safely applied and properly maintained, and to limit their use to their intended purpose. Improper selection, installation or use may result in personal injury or property damage.

S-SW-SPS-00444-3 03-18

S E N T R Y AU TO V R E L F LO W CO N T R O L L E R > S A M P L E CO N D I T I O N I N G AU TO M AT I O N > S A M P L E CO N D I T I O N I N G

4 1/4”[10.8 cm]

4 1/4”[10.8 cm]

9 29/32”[25.13 cm]

6 7/8”[17.47 cm]

Inlet/Outlet 1/4” compression �ttings

Required Clearance

Sentry VREL�ow controller

1 3/16” [3.02 cm]2 1/4” [5.72 cm]

2” [5.08 cm]

3 1/16” [7.78 cm]

NOTE: �ow meter con�guration may vary