Lynn Engineered Systems - Prime News

WAREHOUSE OVERSTOCK SALE!

Check out LYNN’s warehouse deals. Incredible prices. Click here or under Products drop-down for LYNN Warehouse Overstock Sale page.

PROJECT SPECIFIC SUBMITTAL AND IOM MANUAL

So you know exactly what is being produced for your project; each LYNN Vacuum Priming System is furnished with a project specific submittal and Installation, Operations & Maintenance manual. 

For remote installations & when equipment cannot be monitored on a regular daily basis, LYNN’s WatchDog™ is an absolute must.

Unlike draining applications with compressed air tanks, draining vacuum tanks require a completely different process. Mandatory to the process, draining must not interfere with the vacuum system operation.

LYNN’s WatchDog™Automatic Vacuum Tank Drain

LYNN’s WatchDog™ Automatic Vacuum Tank Drain operates without interrupting the priming or vacuum process by eliminating trapped air, allowing unobstructed flow between the system receiver tank and the Automatic Vacuum Tank Drain System receiver tank. This process protects against system shut-down due to fluid build-up in the operation system receiver tank.

LYNN’s WatchDog™ can be easily integrated with a new or existing system or constructed as a stand-alone system.

Contact LYNN to discuss your application.

 

LYNN Offers Equivalent to V-APCO Automatic Priming System Line

LYNN Auto Vacuum Priming SystemLYNN Engineered Systems is able to be specified as an equal to DeZURIK’s former line. LYNN offers a full line of pre-engineered simplex and duplex priming systems for On-Demand or Automatic priming applications. LYNN’s Vacuum Priming Systems are competitively priced , and can be customized to meet any specified application requirement.

LYNN’s Vacuum Priming System designs and construction have evolved through years of demanding real-world use in water and wastewater treatment plants, steel mills, power, mining, agriculture, marine and commercial applications. Experts in Centrifugal Pump Priming, Siphon Prime and Management, and Air Removal Systems, LYNN Engineered Systems have installations throughout North America, South America and Indonesia.

LYNN offers a comprehensive range of support capabilities from design analysis and pre-project specification assistance through commissioning and training.

LYNN is ISO9001:2008 compliant, MSHA 5000-23 Certified and is eligible for Government Contracts as a WOSB.

END LIQUID CARRYOVER FROM DESTROYING YOUR VACUUM PUMP

LYNN’s experts are on it. Introducing the WhiteKnight™ Floating Ball Liquid Isolation Valve.

 

Connecting WhiteKnight™ inline with your process equipment will automatically isolate your vacuum pump from fluid carryover. Unlike water traps which still allow carryover and require monitoring, the WhiteKnight™ offers complete protection and can be setup for continuous unattended service.WhiteKnight Floating Ball Liquid Isolation Valve

Read more about the WhiteKnight™ -patent pending and watch our video

LYNN Adds Process Vacuum Systems To Their Product Line

LYNN Process Vacuum Systems are automatically pressure controlled through the combination of a pressure transmitter and a PLC that can be programmed for optimum application efficiency.

Featuring oil-lubricated rotary vane vacuum pumps, typical uses include molding, packaging, printing, laboratory applications, food processing, laminating, PCB manufacturing and more.

 

The Truth About NPSH & Priming

I am frequently asked whether a priming system can increase the NPSHA (Net Positive Suction Head Available) of a pump installation to help solve cavitation problems due to the pump’s high NPSHR (Net Positive Suction Head Required).

While priming systems perform a critical function, unfortunately this is not one of their benefits. The NPSH of an installation is defined as follows and is usually expressed in Feet of water column:

NPSHA = HA + HZ – HF + HV – HVP

Where:

HA =    Absolute pressure acting on the liquid source, or atmospheric pressure for open sources such as a reservoir, clear well, sump pit, etc.

HZ =    Vertical distance ((+) below, or (-) above) between the source and the pump’s shaft centerline.

HF =    Friction losses in the suction piping.

HV =    Velocity head (typically sufficiently small to ignore).

HVP =   Fluid’s vapor pressure at the operating temperature.

Centrifugal pumps are capable of creating a vacuum to pull up liquid from a lower source, provided the pump starts with a flooded suction. The density of the pumped fluid is directly proportional to the pump’s pressure – head relationship. Let us use water as an example. Since water is more than 800 times as dense as air, centrifugal pumps are simply not capable of developing sufficient vacuum to self-prime from a dry state.

When the HZ component is negative (i.e. pump installed above the source) it represents the static lift requirement for the pump. Vacuum priming systems are used to lift the liquid up to the pump, so that the centrifugal pump can then create sufficient vacuum to overcome the static lift during operation. A gauge reading of the pressure at the inlet to an operating pump represents the NPSHA minus HVP (vapor pressure component), and is commonly referred to as the Total Dynamic Suction Head. Once the pump is running, this pressure exists whether a priming system is connected or not. At this point the priming system is merely removing any gas that accumulates to maintain a liquid level above the suction piping high point where it is connected into the process.

A typical system uses priming valves for preventing liquid carryover back to the priming system. Priming valves are located above the pump’s volute so that complete gas removal (priming) can be accomplished. The priming system creates sufficient additional vacuum to further lift the liquid up into the priming valve so that it closes, effectively isolating the priming system from the process. Whether this location is 1 ft or 10 ft above the centrifugal pump, or the priming valve is open or closed, it does not influence or change the pressure at the suction side of the operating pump. As such, the priming system has no affect or influence on the NPSHA of the installation.

The best method to increase the NPSHA is to look over the contributing factors to determine what changes if any that can increase the NPSH are feasible. For example, increasing the elevation of the source liquid level, increasing the suction pipe size, or removing a foot valve used in conjunction with a priming system. Priming systems preclude the need for foot valves, which only increase the pressure drop in the suction piping, and therefore directly reduce the NPSHA.

One additional feature or benefit of a priming system is the removal of some of the entrained air within the pumped fluid. This does not increase the NPSHA, but it does help alleviate some of the negative effects on the pump caused by excessive entrained air. We’ll save this topic for another discussion!

“Reliable through design” LYNN, we understand priming!

Ned Hoag

President, LYNN Engineered Systems

LYNN Automatic Duplex Vacuum Priming System

LET’S MEET AT WEFTEC

We will be at WEFTEC 2015. We would welcome a chance to meet with you and answer any questions regarding vacuum priming systems, your project and application and how LYNN can assist you.  Drop us an email now: info@lynnengineeredsystems.com.

 

LYNN Engineered Systems Offers Equivalent of the V-APCO Automatic Priming System Line

With DeZURIK’s recent decision to no longer offer its V-APCO Automatic Priming System line, LYNN Engineered Systems is able to be specified as an equal. LYNN offers a full line of pre-engineered simplex and duplex priming systems for On-Demand or Automatic priming applications. LYNN’s Vacuum Priming Systems are competitively priced to DeZURIK’s former line, and can be customized to meet any specified application requirement.

LYNN’s Vacuum Priming System designs and construction have evolved through years of demanding real-world use in water and wastewater treatment plants, steel mills, power, mining, agriculture, marine and commercial applications. Experts in Centrifugal Pump Priming, Siphon Prime and Management, and Air Removal Systems, LYNN Engineered Systems have installations throughout North America, South America and Indonesia.

LYNN offers a comprehensive range of support capabilities from design analysis and pre-project specification assistance through commissioning and training.

LYNN is ISO9001:2008 compliant, MSHA 5000-23 Certified and is eligible for Government Contracts as a WOSB.

 

 
LYNN Reliable through design