GS USP-R
Global Standardized Upstream Pumping Support System, Reservoir Version
The Global Standardized Upstream Pumping Support System (GS USP) is an optimized, pre-engineered design based on John Crane’s fluid control expertise and engineering excellence. The GS USP is a best-practice solution that significantly reduces specification review and delivery schedules, delivering unpressurized barrier water for optimal mechanical seal performance and reliability.
The GS USP supports a dual mechanical seal using John Crane's Upstream Pumping (USP) face technology by controlling the continuous supply of clean water. The clean water is supplied to the seal at low pressure, where it is pressurized as it passes across the seal faces, lubricating the seal. It features a reservoir, which is auto-filled by a float valve, instrumentation for monitoring pressure and level, a filler breather and a check valve.
This product is designed to match the performance limits of John Crane's standard USP seal products. Combining a USP seal with the GS USP unlocks access to significant reliability improvements and reduced running costs by reducing motor power and water consumption.
The GS USP-R is a modular design and can be upgraded with the following:
- Pressure gauges upgraded to pressure switches or pressure indicating transmitters
- Addition of a level switch or level indicating transmitter
- Addition of a filter to the supply
- Addition of a pressure relief valve
- Addition of a heat exchanger
The GS USP-D, an alternate version of the GS USP, connects directly to a site water supply and omits the reservoir to supply a higher pressure to the mechanical seal.
To determine which standardized support system best meets your requirement, read this blog or use our selector tool.
Select your GS USPFor more information about John Crane's Upstream Pumping seal face technology, visit the USP web page.
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Which Global Standardized Upstream Pumping Support System (GS USP) do you require?
Upstream Pumping (USP) is a seal face technology unique to John Crane, which adds the spiral grooves, commonly seen in non-contacting gas seals, to the inboard seal of a dual mechanical seal running on a liquid barrier fluid. The addition of spiral grooves provides unique operational advantages, including improved reliability, virtually eliminates cooling and flush water requirements and lower power consumption.
Mechanical seals using USP have support system requirements unique from traditional dual mechanical seals. A standardized support system is available to supply our standard USP seals. Using one of these systems eliminates the need to design a custom system, saving costs, making operation simple and minimizing space requirements.
The system is available in two variants GS USP-R which includes a reservoir and GS USP-D, which connects directly to the water supply. When to use each system depends on several variables including, fluid type, barrier pressure and fluid quality. Complete the criteria below to determine the best support system for your application.
Is the process compatible with water?
Is the site water supply clean (particle size less than 10μ)?
Does the seal require barrier pressure greater than 0.2bar (3psi)?
Is the system fed by a drinking water connection?
Direct Type (GS USP-D)
The Global Standardized Upstream Pumping Support System (GS USP) is an optimized, pre-engineered design based on John Crane’s fluid control expertise and engineering excellence. The GS USP is a best-practice solution that significantly reduces specification review and delivery schedules, delivering low pressure barrier water for optimal mechanical seal performance and reliability.
Direct Type (GS USP-D) with added filter
The Global Standardized Upstream Pumping Support System (GS USP) is an optimized, pre-engineered design based on John Crane’s fluid control expertise and engineering excellence. The GS USP is a best-practice solution that significantly reduces specification review and delivery schedules, delivering unpressurized barrier water for optimal mechanical seal performance and reliability.
Reservoir Type (GS USP-R)
The Global Standardized Upstream Pumping Support System (GS USP) is an optimized, pre-engineered design based on John Crane’s fluid control expertise and engineering excellence. The GS USP is a best-practice solution that significantly reduces specification review and delivery schedules, delivering unpressurized barrier water for optimal mechanical seal performance and reliability.
Reservoir Type (GS USP-R) (with added filter)
The Global Standardized Upstream Pumping Support System (GS USP) is an optimized, pre-engineered design based on John Crane’s fluid control expertise and engineering excellence. The GS USP is a best-practice solution that significantly reduces specification review and delivery schedules, delivering unpressurized barrier water for optimal mechanical seal performance and reliability.
Consider an alternative fluid such as oil and consult John Crane
A special design may be required
Features
- Best-practice design delivers clean, low-pressure barrier water for optimal mechanical seal performance and centrifugal pump uptime
- Instrumentation to suit the monitoring needs of the user
- Connects directly to site water supply and auto-refills using a float valve
- Contains a reservoir of water able to keep the mechanical seal running for several hours if the water supply is lost
- Safeguards against the toughest environments and provides full containment of volatile organic compounds for zero-emission control
- Streamlined design to minimize footprint and obstruction
- Allows reliable operation of a USP mechanical seal to achieve high reliability, zero-emission sealing of volatile or hazardous fluids
Parameters
- Pressure Limits
- Supply: 6 bar / 87 psi
Design: 42 bar / 610 psi (excluding the reservoir)
Operation: 6 bar / 87 psi - Temperature
- Ambient: 5°C to 60°C / 40°F to 140°F
Operation: 5°C to 80°C / 40°F to 176°F - System Assembly
- 316 SS
- System Compliance
- Confirm process suitability for water barrier fluid
Confirm sufficient shaft speed to achieve USP spiral groove lift-off
Recommended Applications
- Arduous applications demanding pressurized barrier fluid
- Slurries
- High abrasives content
- Caustic process fluids
- Applications with known transient running conditions such as pressure spikes
