Type OHH Pump
API610 9th Ed. (ISO 13709)
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Type OHH Pump
API610 9th Ed. (ISO 13709)
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OHH Design Features
Hydraulics
• Enclosed impellers provided for
increased efficiency.
• Over 70 different hydraulics with
11,000 Nss or less.
• Optional impellers in most sizes for
lower NPSHr.
• Dynamically balanced impeller
• Wear rings and balance holes
optimized to maximize seal and
bearing life.
• Proven Coke Crusher available for
coking applications.
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Initial 2 Pole Hydraulics
(API Flow Limits)
CAP Hydraulic (36x)
ZE Hydraulic (10x)
New Hydraulic (4x)
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OHH Performance
3550 rpm
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OHH Performance
2950 rpm
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Initial 4 Pole Hydraulics
(API Flow Limits)
CAP Hydraulic(45x)
ZE Hydraulic (14x)
New Hydraulic (6x)
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OHH Performance
1775 rpm
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OHH Performance
1475 rpm
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OHH Performance
Improvement Over CAP8
140
120
100
CAP8
80
OHH
60
40
20
0
Total number of Number of Selections at 4 Impeller trim w ill Selection >70% Selection >70% Selection >80% Selection >80%
duty points possible Pole speed not allow 5% of BEP of BEP & allow s of BEP of BEP & allow s
attempted selections head increase 5% head 5% head
increase increase
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OHH Performance
Improvement Over ZE8
140
120
100
ZE8
80
OHH
60
40
20
0
Total number of Number of Selections at 4 Impeller trim w ill Selection >70% Selection >70% Selection >80% Selection >80%
duty points possible Pole speed not allow 5% of BEP of BEP & allow s of BEP of BEP & allow s
attempted selections head increase 5% head 5% head
increase increase
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OHH Design Features
Volute Casing
• Pressure boundary components
designed to ASME Section VIII - with
3mm (1/8") corrosion allowance
• Self venting, center-line discharge
• Double volutes for larger sizes
• Confined controlled compression
gasket with metal to metal rabbit fit.
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Mounting
• Casing mounting feet and baseplate
designed to meet API 610 (ISO 13709)
• 2 x nozzle loads API nozzle load option
available depending on some sizes
• Non-grouted or Pre-grouted baseplates
available for motor or steam turbine
drivers
• API 610 defined baseplate dimensions
are standard. Similar designs and
standards are used where larger bases
are required to accommodate oversize
pumps or drivers
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Flanges
• Back faced ANSI B16.5
300#R.F.flanges with required
serrations.
• ISO/DIN flanges available.
• Top Suction available.
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OHH Design Features
Seal Chamber
• API 682 1st and 2nd edition (ISO
24109) seal chambers and flush
piping for improved seal life.
• Single or dual cartridge type
mechanical seals available to meet all
process requirements.
• API 610 cooling water plans available
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OHH Design Features
Bearing Frame
• 6 sizes of bearing housing cover the
entire product line for maximum
interchangeability.
• Extra heavy duty, large diameter shaft
for low shaft deflection and long life.
• The Oil ring is located in a deep
groove retainer to assure it does not
become displaced and rub interior of
bearing housing.
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OHH Design Features
Bearings and Lubrication
• Thrust bearings are back to back,
heavy duty 40 deg. angular contact
with machined brass cages.
• Ball radial bearing has C3 clearance
required by API 610.
• The Oil ring is located in a deep
groove retainer to assure it does not
become displaced and rub interior of
bearing housing.
• Bearing housing oil channel routes
lubricant to the rear of each bearing
assuring adequate oiling under
difficult operating conditions.
• Ports for purge mist, and pure mist
lubrication are standard.
• Other lubrication options are
available.
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OHH Design Features
Cooling and Coupling Guard
• The standard coupling guard meets
API 610 and OSHA requirements.
Other types of guards are available.
• Bearing Housing is finned Carbon
Steel for added heat dissipation and
API 610 compliance.
• For high ambient or operating
temperatures, a low noise fan is
added.
• For extremely high operating
temperatures a predefined list of
features is available to meet the most
difficult conditions.
• For cryogenic or low ambient
conditions, an oil sump heater is
available.
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OHH Design Features
Casing Drain
• Socket welded flanged drains are
standard.
• Butt welding is available.
• Gussets or bracing available to suit
customer specifications.
• Schedule 160 pipe is standard
• 1" piping available
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OHH
Investment in Manufacturing
• New multi axis SHW machining
center in place (two shift operation)
• Further tooling to follow to further
enhance efficiency
• Upgraded test facilities
– CATS data capture software
– Additional Test Loop with lower
NPSH tank
• New fabrication shop
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