Product Description
H Series by Griswold
The H Series by Griswold is a specialised range of self-priming centrifugal pumps for water-transfer applications. Moreover, these pumps can lift water from suction depths of up to 25 feet, allowing them to operate where conventional centrifugal pumps may face priming difficulties.
The range provides flow rates up to 325 gpm or 73.8 m³/hr and heads up to 260 feet or 79 metres. In addition, maximum operating pressure reaches 110 psi or 7.6 bar, while the listed maximum liquid temperature is 100°F or 37.8°C.
Reliable Self-Priming Operation
A self-priming pump removes air from the suction line before beginning normal water transfer. Therefore, the pump can operate above the liquid source without requiring the casing and suction pipe to remain completely flooded.
The H Series by Griswold uses an extra-large priming chamber and a built-in flapper-type check valve. Consequently, the pump retains water within the casing and reduces the need for repeated manual priming.
Moreover, the check valve helps prevent siphoning when the pump stops. As a result, the system can restart more quickly during intermittent pumping duties.
Key Benefits of the Griswold H Series
The H Series self-priming pump range provides several practical advantages:
- Self-priming suction lift up to 25 feet
- Maximum flow up to 325 gpm
- Maximum head up to 260 feet
- Maximum pressure up to 110 psi
- HL models for lower-flow applications
- HH models for higher-flow applications
- Built-in flapper-type check valve
- High suction-line arrangement
- Heavy-duty cast-iron casing
- Cast-bronze enclosed impeller
- Standard mechanical shaft seal
- Close-coupled and frame-mounted options
- ODP and TEFC motor options
- NPT and flanged connection choices
- Multiple seal and drive configurations
Together, these features provide flexible and durable water-handling performance. Moreover, the broad operating range allows users to select a Griswold H Series pump according to flow, head and installation requirements.
HL and HH Pump Options
The H Series by Griswold is available in two principal hydraulic versions.
HL Pumps
The HL range is designed for lower-flow duties. Therefore, it suits installations where moderate capacity and comparatively higher pressure are required.
HH Pumps
The HH range is designed for higher-flow applications. Consequently, it supports water-transfer duties that require greater pumping volume.
However, the correct model depends on the complete system curve rather than flow alone. Therefore, users should calculate static lift, discharge pressure and piping losses before selecting the pump.
High Suction Connection
The suction connection is positioned above the pump centreline. As a result, the impeller and mechanical seal remain covered with water after the pump stops.
Consequently, this design reduces the need to reprime the H Series pump. Moreover, keeping the mechanical seal wet helps reduce the risk of dry operation and premature seal damage.
Heavy-Duty Pump Construction
The H Series by Griswold uses a heavy-duty ASTM A48 Class 30 cast-iron casing with built-in drain and priming plugs.
In addition, a single-piece cast-bronze impeller is balanced and trimmed for the required operating range.
The standard configuration also includes a carbon, ceramic and Buna mechanical seal with a renewable bronze shaft sleeve. Therefore, the sleeve helps isolate the shaft from abrasion and direct contact with the pumped water.
Alternatively, hard-faced mechanical-seal options may be selected for applications requiring additional wear resistance.
Drive and Installation Options
The Griswold H Series pump can be supplied in close-coupled or frame-mounted arrangements.
Close-coupled models support JM-frame open drip-proof or totally enclosed fan-cooled motors. Meanwhile, frame-mounted versions allow connection to alternative drive arrangements.
Available connection options include threaded or flanged discharge connections and NPT or Victaulic-style suction connections. Consequently, the pump can integrate with different piping layouts and installation requirements.
H Series by Griswold Applications in India
The H Series by Griswold may suit many water-transfer applications across India, including:
- Agricultural irrigation systems
- Water sumps
- Underground storage tanks
- Marine water transfer
- Barge drainage
- Tank-car unloading
- Sprinkler systems
- Swimming pools
- Construction dewatering
- General water transfer
- Light industrial applications
- Emergency drainage systems
For example, an irrigation system can use the pump to lift water from a below-ground reservoir. Similarly, a marine or industrial facility can use a Griswold H Series pump to empty sumps, tanks or barges.
Selecting the Correct H Series Pump
Correct pump selection depends on:
- Required flow rate
- Total dynamic head
- Vertical suction lift
- Suction-pipe size and length
- Water temperature
- Available electrical supply
- Motor enclosure
- Connection requirements
- Installation environment
- Required seal materials
Therefore, users should carefully verify the available NPSH and suction conditions. Otherwise, excessive suction losses may cause slow priming, reduced flow, excessive noise or cavitation.
Why Choose H Series by Griswold?
The H Series by Griswold combines strong self-priming capability with durable cast-iron and bronze-fitted construction.
Moreover, its built-in check valve and high suction connection help maintain prime and protect the mechanical seal.
Therefore, the range is a practical choice for water-transfer applications across India that require dependable suction lift, flexible installation and straightforward operation.
Request a Griswold H Series Pump in India
The H Series by Griswold is presented through Pumps Bharat for irrigation, dewatering, marine, industrial drainage, water storage and general water-transfer applications across India.
When submitting an enquiry, please provide the required flow, discharge head, suction lift, water temperature, pipe sizes, motor supply and application details. With this information, the available HL or HH pump configurations can be evaluated against the operating requirements.