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Products for hazardous environments
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Products for hazardous environments
Dirt and air separator from Armstrong
Neptune Chemical Pump Co., Inc. has expanded its range of series 500 ‘dia-PUMPs’ with explosion-proof motors and NEMA 7 stroke positioners for use in hazardous environments.
Armstrong has added its DAS dirt & air separator to the Air and Expansion Control Line.
Neptune dia-PUMPs are hydraulically-actuated diaphragm pumps that provide leak-free metering of a wide variety of corrosive, flammable or hazardous liquids.
Neptune’s range of explosion-proof motors and stroke positioners for use in hazardous environments.
ATEX certification for rotary power pumps
The explosion-proof model is aimed for use in oil-and-gas, CPI, and a wide variety of other extreme environments. The Series 500 features check valves that are removable for inspection or cleaning without disconnecting piping. With capacities from 0.03 gph to 80 gph simplex and 160 gph duplex, the pumps can handle pressures up to 3,000 psi. The Series 500 pumps have the ability to adjusted by micrometer dial, while running, through 100% of their operating range.
The separator is designed to eliminate entrained air and separate dirt particles associated with the start-up and maintenance of hydronic systems and uses a robust stainless steel coalescing medium, which directs dirt particles of all sizes to collect in the chamber at the bottom of the unit. It also allows the removal of micro-bubbles and entrained air through the air vent located at the top.
The pumps also also feature Nepture’s variable oil by-pass™ stroke adjustment, which can improve valve performance over variable linkage designs. The pump’s liquid end can be constructed of 316SS, Alloy 20, PVC or Kynar.
The new DAS from Armstrong is manufactured to ASME code, and the company claims that it is one of the first products with a welded head that also provides ASME certification as a standard feature in the Separator product class.
New water pump shroud can reduce failures sealing faces, the company claims. Boiling leads to the formation of silicates which can progressively degrade the seal faces, but it can be avoided by raising the pressure around the seal and hence the boiling point of the coolant. At 6000 rpm the Concentric shroud will increase coolant boiling point by around 25°C.
Rotary Power, based in Newcastle-upon-Tyne, UK is now supplying the A range open circuit and C range chemical metering axial piston pumps, fully certified to comply with the ATEX Directive 94/9/EC. The pumps are suitable for Group II, Zone 1 hazardous environment applications, the company says. The A range axial piston open circuit pumps and motors which are available in displacements from 11.5 cc to 125 cc/rev are designed for heavy-duty applications. The construction allows operation on a wide range of fluids including mineral oils, water emulsions, water glycols and phosphate esters, Rotary Power claims, making it suitable for diverse and arduous applications such as subsea and offshore. The C range pumps are suitable for all types of polyol blends and isocyanates used in the polyurethane foam market.
6
www.worldpumps.com
Concentric Pumps’ new seal shroud which forms a pressure chamber around water pump seals.
Concentric Pumps Ltd has patented a new design of seal shroud to combat the problem of leaking seals and consequent bearing failure in automotive water pumps, the company says. The new Concentric design incorporates a shroud, normally of pressed steel, inserted into the pump housing to form a pressure chamber around the seal. This provides a better, more stable environment for the seal, dramatically reducing silicate formation and consequently the risk of failure. It also reduces the
cost of both housing and seal, Concentric says. The unique feature of the Concentric patent is the number of apertures around the periphery of the shroud which allow relatively high pump outlet pressure within the chamber. The space between the shroud and the pump shaft is designed to ensure even distribution of the coolant flow over the seal, while maintaining pressure. The new design is the first to address the problem of localixed boiling of the coolant at the
The high pressure achieved by the shroud also helps to avoid the problem of dry running which can occur when low pressures cause the coolant to vaporize, Concentric reports. The resulting high temperature leads to ‘thermal rotation’ or distortion of the primary sealing ring, again encouraging silicates to form an abrasive film on the seal faces. In addition to its technical advantages, the Concentric shroud is suitable for volume manufacturing and will allow the use of a less expensive seal. It can also form the pump location diameter, so reducing the cost of manufacturing the housing and off-setting the on-cost of the shroud itself.
WORLD PUMPS September 2005
Products for hazardous environments
Dirt and air separator from Armstrong
Neptune Chemical Pump Co., Inc. has expanded its range of series 500 ‘dia-PUMPs’ with explosion-proof motors and NEMA 7 stroke positioners for use in hazardous environments.
Armstrong has added its DAS dirt & air separator to the Air and Expansion Control Line.
Neptune dia-PUMPs are hydraulically-actuated diaphragm pumps that provide leak-free metering of a wide variety of corrosive, flammable or hazardous liquids.
Neptune’s range of explosion-proof motors and stroke positioners for use in hazardous environments.
ATEX certification for rotary power pumps
The explosion-proof model is aimed for use in oil-and-gas, CPI, and a wide variety of other extreme environments. The Series 500 features check valves that are removable for inspection or cleaning without disconnecting piping. With capacities from 0.03 gph to 80 gph simplex and 160 gph duplex, the pumps can handle pressures up to 3,000 psi. The Series 500 pumps have the ability to adjusted by micrometer dial, while running, through 100% of their operating range.
The separator is designed to eliminate entrained air and separate dirt particles associated with the start-up and maintenance of hydronic systems and uses a robust stainless steel coalescing medium, which directs dirt particles of all sizes to collect in the chamber at the bottom of the unit. It also allows the removal of micro-bubbles and entrained air through the air vent located at the top.
The pumps also also feature Nepture’s variable oil by-pass™ stroke adjustment, which can improve valve performance over variable linkage designs. The pump’s liquid end can be constructed of 316SS, Alloy 20, PVC or Kynar.
The new DAS from Armstrong is manufactured to ASME code, and the company claims that it is one of the first products with a welded head that also provides ASME certification as a standard feature in the Separator product class.
New water pump shroud can reduce failures sealing faces, the company claims. Boiling leads to the formation of silicates which can progressively degrade the seal faces, but it can be avoided by raising the pressure around the seal and hence the boiling point of the coolant. At 6000 rpm the Concentric shroud will increase coolant boiling point by around 25°C.
Rotary Power, based in Newcastle-upon-Tyne, UK is now supplying the A range open circuit and C range chemical metering axial piston pumps, fully certified to comply with the ATEX Directive 94/9/EC. The pumps are suitable for Group II, Zone 1 hazardous environment applications, the company says. The A range axial piston open circuit pumps and motors which are available in displacements from 11.5 cc to 125 cc/rev are designed for heavy-duty applications. The construction allows operation on a wide range of fluids including mineral oils, water emulsions, water glycols and phosphate esters, Rotary Power claims, making it suitable for diverse and arduous applications such as subsea and offshore. The C range pumps are suitable for all types of polyol blends and isocyanates used in the polyurethane foam market.
6
www.worldpumps.com
Concentric Pumps’ new seal shroud which forms a pressure chamber around water pump seals.
Concentric Pumps Ltd has patented a new design of seal shroud to combat the problem of leaking seals and consequent bearing failure in automotive water pumps, the company says. The new Concentric design incorporates a shroud, normally of pressed steel, inserted into the pump housing to form a pressure chamber around the seal. This provides a better, more stable environment for the seal, dramatically reducing silicate formation and consequently the risk of failure. It also reduces the
cost of both housing and seal, Concentric says. The unique feature of the Concentric patent is the number of apertures around the periphery of the shroud which allow relatively high pump outlet pressure within the chamber. The space between the shroud and the pump shaft is designed to ensure even distribution of the coolant flow over the seal, while maintaining pressure. The new design is the first to address the problem of localixed boiling of the coolant at the
The high pressure achieved by the shroud also helps to avoid the problem of dry running which can occur when low pressures cause the coolant to vaporize, Concentric reports. The resulting high temperature leads to ‘thermal rotation’ or distortion of the primary sealing ring, again encouraging silicates to form an abrasive film on the seal faces. In addition to its technical advantages, the Concentric shroud is suitable for volume manufacturing and will allow the use of a less expensive seal. It can also form the pump location diameter, so reducing the cost of manufacturing the housing and off-setting the on-cost of the shroud itself.
WORLD PUMPS September 2005