SERVICE & OPERATING MANUAL
AIR OPERATED DOUBLE DIAPHRAGM PUMP
B25 & X25
05 Metallic Series
This pump is Atex approved for use
in potentially explosive atmospheres
Group II category 2
Table of Contents
Service / Maintenance Log, Recycling 2
Dimensions 3
Performance Curve 3
Technical Data & Temperature limitations 4
Explanation of Pump Nomenclature 4
Principle of Pump Operation 5
Installation guide 5
Important Warnings & Safety Information 6
Troubleshooting 7
Grounding the Pump 7
Warranty 8
Service 8
Air Valve Overhaul 8
Wet-side Overhaul 8
Exhaust Safety 9
High Temperature Inst. 9
Parts List 10
Assembly Drawing 11
Declaration of Conformity 12
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II 2 GD c
Service / Maintenance Log
Date Details Completed
RECYCLING
Many components of BLAGDON air operated double diaphragm pumps are made of recyclable materials. We encourage pump
users to recycle worn out parts and pumps whenever possible, after any hazardous pumped fluids are thoroughly flushed.
Contact Information
Contact Phone / Fax No.
HG-CF-1184 Rev. C, 16/11/12 Page 2
GA Drawing & Performance Curve
General Assembly :- B25 & X2505 Metallic pump, All dimensions +/- 2mm
B2505 Metallic Pump performance curve, based on water at ambient temperature
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TECHNICAL DATA
FLUID CONNECTIONS CAPACITY MAX SOLIDS MAX DISCHARGE HEAD DISPLACEMENT/STROKE
1” BSP (F) 0 - 180 Litres/Minute
(0 - 40 Gallons/Minute)
3 MM
(1/8”)
88 Meters
(289 ft)
0.475 Litres
(0.1 UK Gallons)
MAX. WORKING PRESSURE AIR INLET TEMPERATURE LIMITS PUMP WEIGHTS :-
8.6 Bar (125 psi) 3/8” BSP (F) Determined by Elastomers AA :- 13.5 Kg
Caution - Operating temperature limitations are as follows:
Materials
Buna-n - General purpose, oil resistant. Shows good solvent, oil, water and hydraulic fluid resistance. Should not
be used with highly polar solvents like acetone and MEK, ozone, chlorinated hydrocarbons and nitro hydrocarbons.
EPDM - Shows very good water and chemical resistance. Has poor resistance to oils and solvents, but is fair on
ketones and alcohols.
Neoprene - All purpose. Resistant to vegetable oil. Generally not affected by moderate chemicals, fats greases
and many oils and solvents. Generally attacked by strong oxidising acids, ketones, esters, nitro hydro carbons and
chlorinated aromatic hydrocarbons.
Santoprene® - Injection moulded thermoplastic elastomer with no fabric layer. Long mechanical flex life.
Excellent abrasion resistance.
Virgin PTFE - Chemically inert, virtually impervious. Very few chemicals are known to react chemically with
PTFE : molten alkali metals, turbulent liquid or gaseous fluorine and a few fluoro-chemicals such as chlorine
trifluoride or oxygen difluoride which readily liberate free fluorine at elevated temperatures.
Viton® - Shows good resistance to a wide range of oils and solvents : especially all alphatic, aromatic and
halogenated hydrocarbons, acids, animal and vegetable oils.
Polypropylene - High strength, light weight, corrosion resistant polyolefin which easily withstands most
chemicals, with no known solvent at room temperature.
TYPICAL CODE = B25.05. A A. B B. N N S
MODEL
B25 : STANDARD
X25 : ATEX CAT. 2
Operating Temperatures
Maximum Minimum Optimum
176oF
o
C
80
212oF
o
100
212oF
o
100
212oF
o
100
356oF
o
180
356oF
o
180
158oF
o
C
70
C
C
C
C
C
-18oF
o
-28
-11oF
o
-24
-4oF
o
-20
-10oF
o
-23
32oF
o
C
0
0oF
o
-18
32oF
o
C
0
C
C
C
C
C
50o to 140oF
o
to 60oC
10
50o to 212oF
o
to 100oC
10
50o to 130oF
o
to 54oC
10
50o to 212oF
o
to 100oC
10
50o to 212oF
o
to 100oC
10
75o to 212oF
o
to 100oC
24
50o to 140oF
o
to 60oC
10
DESIGN LEVEL
WETTED COMPONENTS
A : ALUMINIUM
S : 316L STAINLESS STEEL
C : CAST IRON
NON - WETTED COMPONENTS
A : ALUMINIUM
VALVE TYPE
B : BALL
W : WEIGHTED BALL
SUCTION ORIENTATION
B : BOTTOM
This pump should be used in accordance with the requirements of the Safety, Health & Welfare at Work Act 2005.
All business conducted subject to IDEX Pump Technologies, Ireland. Terms and Conditions of Sale, available on request.
VALVE SEATS
S : 316L STAINLESS STEEL
VALVE BALLS
T : PTFE E : EPDM
N : NEOPRENE V : VITON
B : BUNA-N S : ST. STEEL
D : ACETAL
DIAPHRAGMS
N : NEOPRENE V : VITON
H : POLYESTER (HYTREL) B : BUNA-N
R : SANTOPRENE
®
T : PTFE
P : POLYURETHANE E : EPDM
O : ONE-PIECE PTFE
IMPORTANT
IDEX Pump Technologies (Ireland) Ltd.,
A Unit of IDEX Corporation,
R79, Shannon, Co Clare, IRELAND.
TEL. : +353 61 471933 FAX. : +353 61 475046
Web Site : www.blagdonpump.com
E-Mail : sales@blagdonpump.com
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