Emerson VAREC 2010B Series Instruction, Operation And Maintenance Manual

VAREC 2010B/2020B/3500B SERIES PRESSURE AND VACUUM RELIEF VALVE
INSTRUCTION, OPERATION AND MAINTENANCE MANUAL
Before installation, these instructions must be read carefully and understood.
FIGURE 1
2010B, 2020B and 3500B Series
2010B
3500B

TABLE OF CONTENTS

Disclaimer of Warranties ���������������������������������� 1
Limitations of Seller's Liability ������������������������� 1
General Information ������������������������������������������ 1
Safety Precautions �������������������������������������������� 1
Product Identification and Marking ������������������ 2
Construction ������������������������������������������������������ 2
Operation ����������������������������������������������������������� 4
Installation ��������������������������������������������������������� 5
Maintenance ������������������������������������������������������ 6
Calibration ��������������������������������������������������������� 7
Dimensions and Weight ������������������������������������ 8
Replacement Parts ������������������������������������������ 13
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DISCLAIMER OF WARRANTIES

The contract between Emerson Automation
Solutions (Emerson) and our customer states
Emerson entire obligation. The contents of
this instruction manual shall not become part
of or modify any prior or existing agreement,
commitment or relationship between Emerson
2020B and our customer. There are no express or
implied warranties set out in this instruction
manual. The only warranties that apply are
those in the existing contract between Emerson
and our customer.
The Varec 2010B/2020B/3500B Series pressure
and/or vacuum relief valve has not been tested
by Emerson under all possible operational
conditions and Emerson does not have all
the data relative to your application. The
information in this instruction manual is not
all inclusive and does not and cannot take into
account all unique situations. Consequently,
you should review this product literature
in view of your application. If you have any
further questions, please contact Emerson
for assistance.

LIMITATIONS OF SELLER'S LIABILITY

If it is determined that this instruction manual
created some new warranties, Emerson liability
shall be limited to repair or replacement under
the standard warranty clause. In no case
shall Emerson liability exceed that stated as
Limitations of Remedy in the contract between
Emerson and our customer.
© 2017 Emerson. All rights reserved.
GENERAL INFORMATION
The 2010B/2020B/3500B Series pressure
and/or vacuum relief valves are designed to
protect low pressure storage tanks, sludge
digesters and gas holders from excessive
pressure and/or vacuum. The valve is
installed on the storage tank roof or digester
cover. It may be used in combination with a
flame arrester.
The 2010B Series valve relieves pressure
directly to the atmosphere. A weatherhood and
mesh screen protect the pressure pallet and
guideposts. Vacuum pressure is relieved by
inbreathing ambient air.
The 2020B Series valve relieves pressure
through an enclosed outlet adapter. Product
vapors may be piped away rather than relieving
directly to the atmosphere. Vacuum pressure is
relieved by inbreathing ambient air.
The 3500B Series valve is a vacuum relief valve
that relieves negative pressure by inbreathing
ambient air.

SAFETY PRECAUTIONS

Read and understand this instruction manual
before installing, operating or performing
maintenance on 2010B/2020B/3500B Series
pressure and/or vacuum relief valve. Follow
all precautions and warnings noted herein
when installing, operating or performing
maintenance on this equipment.
WARNING
Relief valve must be isolated from tank pressure
before servicing. All gas must be blocked and
pressure safely vented.
Safety precaution definitions
CAUTION
Damage to equipment may result if this
precaution is disregarded.
WARNING
Direct injury to personnel or damage to
equipment which can cause injury to personnel
may result if this precaution is not followed.
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