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聯絡資訊
13/1, City Heart, 67 Naya, Paltan, Dhaka, Bangladesh
電話：880-2-8318672
傳真：880-2-9331527
Pneumatic Pump
產品型號：DDA
產品分類：紡織染整成衣暨縫製機械 / 紡織染整機械 / 烘乾洗衣設備
產品特色
PUMPS CONFIGURATION
Pump with reciprocating coaxial chambers with in built
valves seats and manifolds located above and below of the
chambers (R version, reversible, excluded).
Un balanced air distributor with air spring assisted differential
air distributor spool.
Separate pilot spool valve coaxial to the shaft of the diaphragm.
(mod. 50C excluded).
Air distributor command reversed at the end of each stroke
of the pilot spool valve.
Air flow to diaphragms’ pressurisation chambers adjustable.
Performance regulation on request from the model 50 and
above.
OPERATING PRINCIPLE
Astra pump are double chamber volumetric pumps.
The diaphragms linked by a common shaft move of alternative
motion within coaxial chambers and are displaced
by pressurised air alternatively delivered to their rear side by
an air distributor such that while one diaphragm draws the
fluid into one chamber from a common manifold the other
diaphragm pumps the fluid from the opposite chamber in
to the other common manifold.
SIZES
Depending upon the application we propose different
designs for the same pump size aimed to obtain specific
benefits like compact dimensions, reduced cost or superior
performance.
Currently the range proposed includes the sizes 1/4” - 3/8”
- 1/2” - 3/4” - 1” - 11/4” - 11/2” - 2”. In the near future we will
manufacture the larger sizes 3” e 4”.
MAIN CHARACTERISTICS
• Can run dry.
• Dry lift up to 6 m.
• Operates pneumatically. Doesn’t need electrical actuators.
• Stall free pneumatic circuit.
• Easy to install.
• Submersible.
• Lube free.
• Adjustable flow.
• Pumps fluids laden with solids.
• Pumps viscous liquids.
• Pumps liquid with low flash point.
ATEX
All metallic and plastic standard executions are adequate
to operate in environments at risk of explosion classified as
“Zone 2” (Series II 3/3GD IIB T 135°C) of European ATEX regulation.
For operations in ATEX areas classified as “Zone 1” (II 2/2gd
IIB T 135°C) Argal offers pumps manufactures with conductive
parts for all thermoplastic and metallic version.
INSTALLATION
ASTRA AODD pumps can be installed like here illustrated
for the operations of transfer, feeding, circulation, injection,
emptying, dosage.
Self-priming
trolley mounted
self priming
Suspended
Positive suction Submerged
MATERIAL OF CONSTRUCTION
Argals’ AODD pumps are manufactured either with thermoplastic or metallic materials.
Available thermoplastic materials are glass fibre reinforced polypropylene (GFR PP), and carbon fibre filled polyvinylidene
fuoride (CFF PVDF); construction with pure PVDF is available for a restricted range of models.
PP: resists to aqueous solutions of acids alkalis, salts and several organic solvents; is not resistant to concentrated oxidant
acids.
PVDF: resists to acids, saline solutions, aromatics hydrocarbons, aliphatic and chlorinates, alcohols and halogens.
Metallic pumps are made of Aluminium e Stainless Steel SUS 316 for industrial use or of electro polished Stainless Steel SUS
316 with clamp connections and compliant to FDA regulations for food application.
Thermoplastic diaphragms
Offer high chemical resistance, abrasion resistance and long
life ; are made of Keyflex®, Santoprene® and Polyurethane ;
the broad range of application these materials are adequate
to, eases the choice of the correct pump execution.
Elastomeric diaphragms
Deploy blend of rubbers embedding nylon made reinforcing
mesh designed to increase their mechanical resistance.
Most common elastomeric rubbers are nitrilic (NBR) and
ethylene propylene diene monomer (EPDM) based. On request
we deliver also fluorinated rubber FKM diaphragms
(e.g.: Viton®).
PTFE diaphragms
Il PTFE is the fluoro-polymer material with the broadest
chemical resistance.
Our PTFE diaphragms are manufactured with a special process
to be flexible and resistant.
In our ASTRA pumps the PTFE diaphragm is always backed
up by a rear diaphragm of thermoplastic rubber which increases
the resistance and its service life.
EXEC. Code Diapragm Balls Ball seats Application
10 U D Z Polyurethane EPDM Polyethylene Abrasion
11 HT D Z PTFE EPDM Polyethylene Abrasion and average chemical resistance
12 M T Z Santoprene® PTFE Polyethylene Depuration (economical alternative to execution 13)
13 HT T Z PTFE PTFE Polyethylene Standard version ; Depuration , filtered oil ; low noise level )
14 HT S Z PTFE SUS 316 Polyethylene Depuration (As execution 13 but with heavy ball )
15 M S Z Santoprene® SUS 316 Polyethylene Depuration (economical alternative to 13, mild liquids with presence of solid)
16 M D S Santoprene® EPDM SUS 316 Depuration (economical alternative to 13 in presence of solids )
17 HT S S PTFE SUS 316 SUS 316 Dense fluids; Crude Oil ; best dry lift
18 M S S Santoprene® SUS 316 SUS 316 Dense fluids
19 HT T K PTFE PTFE E-CTFE Excellent chemical resistance ; ultra Pure liquids
20 HT T S PTFE PTFE SUS 316 Solvents ; Inks ; paint ; enamels
21 HT T A PTFE PTFE Aluminum Economical for pure hydrocarbons
22 H T A Keyflex® PTFE Aluminum Economical for dirty hydrocarbons
23 HT T S PTFE PTFE SUS 316 polished Auxiliary services food and / cosmetic sector
24 HT S S PTFE SS 316 SUS 316 polished Auxiliary services food sector / cosmetics; high Viscosity
CODE AND APPLICATIONS OF WETTED PARTS
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