Delta PD Pumps Private Limited Wadala, Mumbai, Maharashtra

Delta Twin Screw pumps work on unique principle that makes it the only choice for certain applications. No other design of Positive Displacement Rotary pumps offer so much versatility in the operating parameters with guaranteed total reliability and maintenance-free service. Delta Group have earned a reputation of providing the most reliable Positive Displacement Pumps for practically any given application since 1968 due to the widest choice of designs available and excellent knowledge of application engineering. Continuous Research and Development together with modernization with CNC machines and testing facilities has enabled us to accept challenging jobs. Several of Delta pumps in operation since decades to the total satisfaction of the users in core industries throughout the country and abroad are a silent testimony.Working PrincipleA pair of specially profiled screw, machined integral from solid stock and well supported on antifriction bearings run in precision bored interchangeable casing liners. Each screw set has one right hand and one left hand screw engaging with a similar but opposite hand screw pair. A pair of hardened and profile ground timing gears synchronize the screws to maintain a small but positive clearance between the flanks thus ensuring no metal to metal contact. The pumps can therefore run dry for sometime without any damage. This unique feature enables to run the pump even dry and handle fluids that do not have enough lubricating value and also very low or high viscous products. Consequently, since there is no metal to metal contact; wear and tear is reduced to the minimum, ensuring extremely long service life. With two pairs of screws running in the same casing, the internal velocities are very small - consequently the NPSHR is practically the lowest even when the pumps run at motor speeds and while handling viscous products. Opposed screw pitches totally eliminate axial thrusts. Relatively small diameters of screws enables the pump to operate at high speeds directly coupled to prime movers - without the need for speed reducers even while handling high sealing’s always under suction pressure, thus making use of simple, inexpensive seals. The axial flow without turbulence, rotation, churning, chewing guarantees gentle handling of products. Noise and vibration or ---- levels are about the lowest. Positive clearance between running parts makes it easier to construct the pump in different materials safely, especially in stainless steel, without the fear of seizing. Thus a variety of fluids can easily be handled by selecting the right materials of construction.Typical ParametersTemperature: -30 to +350°CViscosity: 1 cSt to 50,000 cSt or moreCapacity: 20 to 500 m3/hr Pressure: Normal 16 bar/ 24bar, with special designs upto 50 barSpecialties: Partial heating/ complete heating/ cooling arrangementsSealing: Stuffing box/ mechanical seal with or without quenching/ heating/ coolingMounting: Horizontal foot mount/ vertical pedestalAccessories: Relief valves, base frame, coupling, coupling guard, companion flanges, pressure gauges, electric motor/ diesel engines, variable speed drives and as per customer requirements.Salient FeaturesPositive clearance between rotors Insensitive to varying viscositiesNo metal to metal contact between rotors Long maintenance free serviceDry running capability Lowest NPSHRNegligible wear over years Shaft sealing at suction pressuresAxial smooth steady flow Axial thrusts completely eliminatedHigh speed running Interchangeable linerPulsation free output Adaptability of various MOCNegligible vibrations Typical ApplicationsLoading / unloading of fuel oil and other products from: Railway wagon rakes, Truck tankers, Barges, Ships and Tankers.Bulk cargo handling.Lubrication, circulation and cooling.Process pumping of high viscous products, bitumen, molasses, soap and similar products.Long distance pipeline pumping of viscous products. Typical Liquid ListAdditives ParaffinBase oils Petroleum productsBitumen PolyesterFuel oils - all grades ResiduesLubricating oils - all grades SoapLyes Vegetable oilsMolasses Major IndustriesPetroleum refineries, Terminals, Depots, Oil blending stations, Thermal power plants, Steel plants, Fertilizer industries, Petrochemical plants, Carbon black, Sugar, Paper and Pulp, Marine.

Delta Corporation group is the pioneer in the field of Positive Displacement Rotary pumps since 1968. They introduced for the first time in India the concept of "Three Screw Pumps" in 1970's. Foreseeing the growing demand for totally reliable fuel and lube oil pumps for Thermal and Hydel Power Plants, Fertilizer, Chemical and Steel Projects a beginning was made by importing critical components and building pumps locally. Over decades, thousands of Three Screw pumps have been manufactured and delivered. Valuable experience was gained and modern manufacturing and testing facilities established under guidance from world-renowned European companies. Over the years the market has grown considerably and the field of applications has become more diverse for these pumps, compelling innovations in the design and production of the pumps to answer the demands of the market. In line with the current requirements, Delta is proud to present to this mature market, reliable, low noise, low vibration and low cost three screw pumps produced as per the latest state of the art manufacturing practices. We have partnered with Settima Meccnaica s.r.l who are leading manufacturers of screw pumps in Europe since 1978. Settima has focus on low noise, low pulsation pumps which help increase the overall efficiency and life of the pumps Settima-Delta pumps are on the OEM list of major plant and equipment manufacturers, consulting organizations and has met with approvals from third party inspection agencies - national and international. Working Principle Settima-Delta Three Screw pumps employ just three screw elements - one power screw and two idler screws running in the three precision bores in the housing or liner. The screws are so profiled that they form a liquid tight seal between the thread. As the screws rotate, pockets/ cavities are formed where liquid gets trapped and conveyed from one end of the infinite stroke. This results in smooth, pulsation free flow with extremely low noise and vibration levels, almost impossible to be achieved by any other design of positive displacement or other types. The power rotor does not drive the idlers as commonly believed. The hydraulic forces acting on screw flanks turn the idlers torquelessly thus reducing the friction. The idlers simply roll over the root diameter of idler dia.reduce the unit pressure, centralize the power rotor and absorb the radial loads. A balance piston integrally machined on power rotor takes care of axial thrusts. While in operation, the screws are in hydrodynamic balance on film lubrication and do not require any additional bearings. The one ball bearing often used is only for axial positioning of rotor and safer operation of mechanical seals. Small rotor dimensions enable the pump to be operated at high speeds directly coupled 3000 or 3600 RPM motors or other prime movers. Such unique design and features has demonstrated excellent reliability with pumps in operation continuously non-stop for decades together without replacement of any components or maintenance on clean fluids. Salient Features High reliability High speed capability High speed capability Long service life Insensitive to viscosities Insensitive to viscosities Negligible maintenance High pressure capability High pressure capability High efficiency Axial flow - no churning, chewing or shearing Axial flow - no churning, chewing or shearing Self priming Excellent suction capability Excellent suction capability Smooth pulsation free flow Hydraulic balancing of forces eliminates need for any bearings Hydraulic balancing of forces eliminates need for any bearings Low noise and vibrations   Typical Applications Fuel Oil Service:Fuel oil burner service for Thermal Power Plant/ Industrial Package, Boilers, Furnaces, Kilns and Combustion systems. Fuel transfer and booster service for Captive Diesel/ Gas Turbine Plants and Industrial Combustion Systems, Fuel Oil Circulations and Centrifuge Feeding. Tank farm tank to tank transfers. Hydraulic Duties :Hydraulic governing service for Water Turbines, Inlet Penstock Valves. Low and medium pressure hydraulic applications, high pressure jacking oil service for rotor lifting for Turbines/ Compressors/ Alternators. Lubricating Duty :Pressure lubrication and cooling of bearings for Turbo Machinery, Gear Boxes, Bearing Lubrication of Coal Mills, ID/FD Fans, Diesel Engines, Steel Rolling Mills, Air pre-heater guide bearings, Compressors. Seal Oil Service :Hydrogen cooled Generators, Gas and Refrigeration Compressors.

delta progressing cavity pump is a positive displacement single screw rotary pump. The pumping elements are rotor and stator. The single helical rotor rolls eccentrically in a double threaded helix stator of twice the pitch length. A series of sealed cavities 180° apart are created that appear to progress from suction to discharge during one rotation of rotor. the opposing cavities fill and empty simultaneously resulting in a pulsation less flow. The fluid travels axially with relatively low velocity and minimal agitation. the stator is made of a resilient elastomeric material and bonded to the stator tube. The important feature of the pumping principle is the ability to handle slurries and solid particles. The elastomer stator also permits passage of solid particles due to elastomeric deformation. The compression fit of the rotor and stator enables the delta progressing cavity pumps to handle gaseous and low viscosity liquids. the pressure capabilities of the pump are a function of the number of cavities. Delta progressing cavity pumps are available in a wide variety of materials - cast iron or stainless steel wetted parts and 10 standard elastomer materials. Delta’s versatile progressing cavity pumps are rugged, compact and highly efficient. fluids, which are delicate, shear sensitive or abrasive, low or high viscosity, with fibres, with high air content or large solids, can be conveniently handled by delta’s progressing cavity pumps.salient features sturdy drive design provides strength for rigorous continuous operation.unique joint design is very simple and maintenance free joint, does not require replacement due to wear and tear, common in other joint designsmaintenance friendly design of the pump enables complete maintenance of the pump without removing the suction and discharge pipelines.close coupled models with built-on speed reducers offer compact pumping unit.stators are available in a wide range of elastomers.suction lift to 28' w.c. (water column)technical parameterscapacity: 5 to 2700 lpmdifferential pressure: 24 bar max.temperature: from cryogenic to 100°cviscosity range: 1 to 100,000 cp drive arrangements possible:direct drive with motorthrough gear boxv-belt pulleysvariable speed drivesspecial drives such as hydraulic, with i.c. Engines.

The very first pump produced by Delta Group in 1968 was an Internal Gear Pump Model DIG-10 for low-pressure burner service - till this day it is in production with great success. Subsequently Delta Group had the foresight to introduce several other designs, to take care of growing industrial demands, thus placing themselves on the forefront in the field of Rotary Positive Displacement Pumps. Experience gained over years in designing and building Rotary Pumps combined with knowledge in Application Engineering has resulted in this development of New Stainless Steel Internal Gear Series specifically for food, chemical and pharmaceutical industry. Innovation, simple construction has ensured very easy maintenance and totally reliable hassle free installation. Working Principle Delta DIG series employs proven Internal Gearing (Gear within Gear) principle for pumping. The main gear is keyed to the drive shaft, and rotates concentric in the pump casing. Idler is located on an eccentric pin on the front cover to rotate freely and meshes with main gear when assembled. A crescent shaped partition precision machined on the front cover maintains a small, but positive clearance to achieve perfect scaling between parts. As the gears come out of mesh, a partial vacuum is created, forcing the fluid to rush into the pump casing and fill in the voids between the teeth. Both gears rotating in the same direction of rotation gently transfer the fluid to the delivery port. The resulting action is a smooth-steady flow; low in pulsation, noise and vibration.Single shaft design well supported on outboard bearing (except for one inside sleeve bearing) enables to pump products even with poor lubricating value unlike in the external gear pumps. External bearing construction offers easy access the pump components i.e., rotor set and even pump casing simply by removing the front cover without disturbing drive parts, bearings etc., and in place. Block pump mounted integrally on hollow shaft gearbox automatically reduces the speed (in several ratios) and enables even the pump rotor to be pulled out without disturbing the drive! It is easily possible to jacket front and rear covers for products heating - thus making the design unique and versatile - ideally suited for process pumping.Salient Features Smooth quite flow ReversibilityExcellent self priming Bracket/ Gear box mounting allows free expansion/ contraction - alignment not affectedInsensitive to viscosities Easy maintenanceAll metal construction, no contamination Built-in reducer offers ideal speed range 240~960 RPMSingle sealing, external bearing Slow speeds ensure better pumping & longer lifeLow noise and pulsation Reduced maintenanceConstruction The DIG series is modular developed with excellent interchangeability. The pump is available either as bracket mounted 'BM' or gearbox mounted 'GM" models. The bracket mounted casing construction provides stress free operation while handling products at higher temperatures. The major components are casing, front cover, rear cover, seal box (casing parts) and rotor set (rotor, idler and shaft). Most casing components are made by lost wax process for better finish and grain structure.'GM' version offers a choice of different speed ratios, making it easy to handle viscous products besides eliminating problems of alignment, extra set of coupling. Standard 4 pole or 6 pole motors can be directly coupled to such units making it very reliable, compact and clean drive. Another unique feature is the adjusting clearance between rotor set and cover by means of rotor positioning device enabling to restore pump capacity even after wear and tear after a long use.Pumps can be equipped with Heating/ Cooling Jacket on front cover/ rear cover and in some cases also Pump Housing. Choice of Mechanical Seal/ Stuffing box is available for shaft sealing.Typical ParametersCapacity upto 800 LPMPressure upto 14 kg/cm2Viscosity upto 100,000 cStTemperature upto 200°C