Key Features
GENERAL
Type V Series of Rotary Positive Displacement Gear Pumps incorporate spur gears which have a special corrected and rectified profile in order to obtain the maximum possible volumetric output and pressure consistent with the lowest possible noise level.
A special feature is that
the pumps are reversible. That is to say that when the rotation of the pumo Is reversed,
the flow of liquid takes place in the opposite direction. The pump is, therefore, the first choice for applications involving emptying and re-filling cycles.
The spaces between the teeth of the driver and driven gears entrain the pumped liquid and convey it from the suction side to the discharge side.
This gentle and simple action
ensures that no shock or violent disturbance is transmitted to the media, so that delicate liquids can be handled without altering their physical characteristics.
The pumps retain the basic principles of all positive displacement pumps, viz:-
- Self Priming
- Capacity varies as the rotational speed
- Pressure developed is independent of the rotational speed
The pumps can be driven by:-
- 4 – 6 - 8 pole electric motors, 50 or 60 Hz direct coupled through flexible couplings
- Geared motors and speed reducers
Speed variators. In this case, the pumps can be used as Dosing and Metering pumps since the capacity varies as the rotational speed
APPLICATONS
These pumps are widely used for handling hot, cold, low and high viscosity liquids,
provided they are free from abrasive and suspended particles and possess slight lubricating properties.
The pumps are equipped with
two heating or cooling chambers as standard features which make them attractive for use in Process industries. The chambers are rated
for 6 Bar internal pressure.
Built on relief valves and bypass are available for applications
not exceeding 10 Bar
All units are tested before despatch to British Standards, and the tolerances comply with Class II Tests (+/- 10%)
COMMON TYES OF INSTALLATIONS
- Displacement pumps
- Pressurizing pumps
- Circulating pumps
- Dosing pumps
- Injection pumps (into vacuum systems)
- Extraction pumps (from vacuum systems)
STANDARD CONSTRUCTION
Casings, covers and chambers: Close grained Cast Iron to BS 1452.17
Gears and shafts: Carbon Steel, hardened and ground
Casing joints: O rings
Bearings: Renewable bronze sleeve bearings, self lubricating
Shaft sealing is guaranteed by uni directional mechanical seal with Carbon/Steel faces and Viton O rings
Mechanical seals with PTFE elastomers can also be supplied together with special seal faces of tungsten or silicon carbides
STAINLESS STEEL CONSTRUCTION
Casings and covers: Cast CF.8.M Stainless Steel
Chambers: Close grained Cast Iron to BS.1452.17
Gears and shafts: AISI 316 Stainless Steel, heat treated
Bearings: Special resin impregnated carbon
Casing joints: Viton O rings. On request, PTFE
Mechanical Seal: To suit the liquid handled. Uni-directional
Suction and discharge connections are threaded male pipe thread. On request, flanges to BS.4504 Table 25 can be provided, as well as flanges to ANSI B 16.5
If required, the pumps can be equipped with conventional packed stuffing boxes, either single or double, with lantern ring
SPECIAL CONSTRUCTION
Pumps can be supplied to suit the customers particular requirements, and to A.P.I. specifications.
