VAREC
3600B/3650B SerieS preSSure or vacuum relief valveS
INSTRUCTION, OPERATION AND MAINTENANCE MANUAL
© 2017 emerson. all rights reserved.
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
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 3600B and 3650B Series pressure
or vacuum relief valves have 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.
Emerson.com/FinalControl
Before installation, these instructions must be read carefully and understood.
D104513X012 19/08
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
SAFETY PRECAUTIONS
read and understand this instruction manual
before installing, operating or performing
maintenance on 3600B and 3650B Series
pressure or vacuum relief valves. 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.
GENERAL INFORMATION
The 3600B and 3650B Series pressure or
vacuum relief valves are designed to protect
low pressure storage tanks, sludge digesters
and gas holders from excessive pressure or
vacuum.
The 3600B Series vacuum relief valve is a side
mounted valve that relieves negative pressure
by inbreathing ambient air.
The 3650B Series pressure relief valve is a top
mounted valve that relieves pressure through
an enclosed outlet adapter. product vapors may
be piped away rather than relieving directly to
the atmosphere. This valve may also be used as a
side mounted vacuum relief valve with the intake
flange connectable to a dehydrator.
fiGure 1. 3600B aND 3650B SerieS
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 �������������������������������������������������������5
Calibration ����������������������������������������������������������6
Dimensions and Weight �������������������������������������7
Replacement Parts �������������������������������������������11
3600B Series
3650B Series
