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Guest Post: How Centrifugal Pumps Are Different From Diaphragm Pumps

Posted by Sprayer Depot on Wed, Jun 08, 2016

Contributed by Guest Blogger: 
Mark Techler,  Factory Representative - Hypro & SHURflo Ag and Industrial Pumps and Accessories

Diaphragm pumps are recommended for sprayers needing pressures up to 700 Centrifugal_Pumps.jpgpsi, including applications like insecticide and fungicide spraying and spraying trees. If you need 100 psi or less for spraying or liquid transfer, consider a centrifugal pump, which will give you the option of higher flow plus these other features:

  • Centrifugal pumps are simple compared to diaphragm pumps. With so few moving parts, a centrifugal pump needs less maintenance and can last longer than a diaphragm pump. A centrifugal pump has no gearbox, diaphragms, check valves, sight glass, pulsation damper, gear lube, or crankcase oil.
  • Centrifugal pumps do not require a relief valve. When the spray boom or gun on a centrifugal discharge is shut off, and the pump continues to run, the liquid internally bypasses without damaging the pump as long as a vent line is in the system.
  • The line strainer can be plumbed into the discharge side of a centrifugal pump instead of the suction side as on a diaphragm pump. This eliminates the potential of a clogged strainer reducing flow to the pump suction port and causing cavitation. Use the Hypro 3350 series strainers that are rated at 200 psi.
  • Higher pressure on a diaphragm pump requires more hp. Higher pressure on a centrifugal pump requires less hp. You will get less flow with higher pressure on a centrifugal, but that flow may be adequate for your application. Always consult the pump performance chart.

Tips for using centrifugal pumps:

  • Consider both spray centrifugals (higher pressure) and transfer centrifugals (higher flow) when choosing a pump.
  • Know your material options: cast iron, stainless steel, polypropylene, and (for transfer pumps) aluminum.
  • Know your drive options: pedestal with belt and pulley or direct drive, hydraulic motor, gas engine, PTO drive with planetary gear, electric motor, and 12-volt clutch drive.
  • If your liquid source provides a flooded suction you can use a non-self-priming centrifugal. Use a self-priming centrifugal pump when the liquid source is below the pump.
  • Use inlet plumbing one pipe size greater than the suction port of the pump. You can choke down the discharge side but do not starve the suction side of the pump.
  • Use a vent line kit to improve priming, remove air from the pump, and to let hot water escape from the pump when the outlet is shutoff - and let cooler water in. This is cheap insurance against a seal failure.
  • Consider a Life Guard seal if you suspect a run dry condition. This silicon carbide seal is more abrasion resistant than standard carbon-ceramic seals and conducts heat away from the seal area, resulting in longer seal life. Use this with cast iron and stainless pumps only.
  • Increase pressure by running at 6000 rpm. Hypro cast iron pedestal pumps can be belt driven to 75 gpm at 140 psi by running at 6000 rpm.

Centrifugal pumps are a low cost of maintenance option for spraying and transferring liquids.

Shop Hypro Centrifugal Pumps  

 

 

Topics: Hypro, Diaphragm pumps, sprayer, Centrifugal Pump, Transfer Pumps, Guest blog

3 Reasons Why You Should Buy a Pump from Sprayer Depot

Posted by Sprayer Depot on Wed, Aug 20, 2014

You’re on the market for a new spray pump. You have a pretty clear idea of what you need. After all, nine times out of ten it’s a replacement pump that’s on its last leg and in need of replacing. Not an easy pill to swallow when you have to buy one of the most vital parts for your sprayer. But where do you start?

Does this scenario sound familiar? Since we're more focused on your needs than your wallet, here we’ll share three foolproof tips to get you the best product for your needs at the best price. 

Tip #1: Inventory
Whether you’re in the market for a diaphragm pump, roller pump, centrifugal pump, piston pump, transfer or plunger pump, find a retailer that covers the spectrum with a variety of brands on hand for sale. Look for a retailer that carries major sprayer pump brands like Hypro, Udor, Comet, Banjo, Myers and SHURflo, to name a few. Since not all brands manufacture all pump types, at Sprayer Depot you’ll find a better selection for your needs and a more knowledgeable team to answer any questions. Sprayer Depot carries all the major brands for practically every type of spray pump at the best price.

pump

Tip #2: Price Matching
Speaking of price, don’t be afraid to shop around. You’ll find out more about the product you’re looking for from kicking the proverbial tires at a few shops before settling on one. That will also give you a chance to scope out who has the best pricing policy – for example Sprayer Depot will match any competitor’s price (must be an authorized dealer/distributor). We strive to offer the lowest price on all major spray pump brands, but if you happen to find a lower advertised price from an authorized distributor, Sprayer Depot will match or beat that price! When you’re shopping for a part like a pump you know your going to have to spend a pretty penny so why not get the best deal.

Tip #3: Customer Service
You’re a pro so the customer service team from any retailer won’t show you how to do your job, but they can offer some insight into the latest tricks of the trade. At Sprayer Depot, our knowledgeable customer service technicians have more than 55 years of combined experience in the industry. Many of them have worked their way into the role through production jobs building the very sprayer you use today. So they know their stuff and speak your language. Plus, they’re not sales guys aiming to make commission – they genuinely enjoy what they do and strive to assist folks in finding the product that’s best for their needs.

So the next time you’re in the market for a spray pump, or really anything for your sprayer equipment, remember to consider inventory, price match policies and customer service. Better yet, just give the guys at Sprayer Depot a call or visit the online store. You’ll be in good hands.

Topics: Spray Equipment Maintenance, Hypro, Udor, Diaphragm pumps, Sprayer Depot, Sprayer Parts, diaphragm pump, Diapgragm pumps, sprayer, Centrifugal Pump, Roller Pump, centrifugal pumps, roller pumps, sprayer pumps, Udor Pumps, Transfer Pumps, Hypro Pump, Sprayer Pump, Roller Pump Repair, spray pumps, centrifrugal pump, Shurflo, sprayer equipment, parts, Comet Pumps, Triple Diaphragm Pumps, Pump, sprayer tips and tricks, customer service, Banjo, Myers, Myers Pumps, Banjo pumps, SHURflo pumps, buyer beware, price match, best price, lowest price

Guide to Pump Repair Kits and Routine Maintenance

Posted by Sprayer Depot on Tue, Jun 24, 2014

We are halfway through spray season and you know what that means, time for routine maintenance to keep your sprayers working like a well-oiled machine. Most manufacturers recommend this regular upkeep every three months, with more attention needed during this heavy use time of year. Here we’ll cover three sprayer pump types – diaphragm, centrifugal and roller – and provide the information you need to know to ensure smooth operation for the remainder of the season.

Hypro D30 Pump                   Hypro Roller Pump                    Hypro Roller Pump 7560

First, you’ll need a pump repair kit. Repair Kits are unique for each type of pump and include durable items intended to repair components that see more wear-and-tear or need extra attention every few months. You will notice o-rings, seals and diaphragms in these kits, among other components. So let’s take a closer look:

D30 Diaphragm Pump Repair Kit (Item #9910KIT1724)  

  • Hypro recommends changing diaphragms every 3 months or 500 hours.

  • Watch this video for a closer look at how to install a pump repair kit.

  • If the oil in the sight glass on the pump turns a milky color or oil comes out of the discharge port you most likely have a diaphragm rupture.

  • Diaphragms are the main wear part on the pump and separate the oil-filled crankcase from the chemical you are spraying. Failure to change diaphragms regularly, or run the pump with ruptured diaphragms, will cause pump failure – and a lot of headache.

7560 Series Roller Pump Repair Kit (Item #34300381)

  • Roller pump repair kits include new seals, rollers and o-ring for the endplate.

  • If your pump does not prime or experiences loss of pressure, this can be caused by stuck rollers or seals leaking air. If the pump shaft will not turn there may be solid objects caught inside the pump or the pump itself may need to be replaced.

  • Before ordering a repair kit, press the pump apart and inspect the body and endplate for lips or indents. If you find lips or indents the pump will need to be replaced. If the body and endplate are in good condition, installing a repair kit will have the pump running to specs.

Hypro Cast Iron Centrifugal Pump Repair Kit (Item #34300332)

  • Centrifugal pump repair kits include the mechanical seal, flat gasket and body o-ring.

  • If liquid is leaking out of the weep hole on the pump this indicates the seal is worn. This can be caused by running the pump dry or from failure to flush the pump out after use.

  • If you are experiencing low discharge output the impeller might be scarred or clogged. Impellers are not included in the repair kit, but are sold separately.

All in all, a pump repair kit is ideal to properly care for your sprayer and this simple routine maintenance will alleviate any frustration or delay in work. While you’re taking a closer look at your sprayer, check all washers and gaskets to prevent leakage, and spray hoses should be inspected under high pressure by using plain water periodically during the heavy use season. Once you’re done you’ll be happy to have invested the little bit of time to keep your sprayer in optimal working condition. 

Topics: diaphragm pump, Pump Repair, Centrifugal Pump, Roller Pump, pump repair kit, o-rings

Common Causes of Pump Failure

Posted by Marketing Manager on Fri, Mar 21, 2014

Contributed by Guest Blogger:  John Lang, Hypro

Three Steps to Prevent Pump Failure

Your pump can fail or become inoperative when left dormant for long periods of time. The elastomeric (rubber) components, when left in a compressed state, will take a “set”. When this happens the rubber components deform to their compressed state  over time and don’t properly respond when brought back into service. The rubber components are also susceptible to “drying out” when stored without liquid in them. The elastomers don’t actually dry out but some chemistries that have come in contact with the elastomer can react with air and become hard and brittle.  To prevent these types of failure during seasonal storage perform these three operations.  
 Hypro Pump
  1. Adequately flush the pump and solution system to remove all residue of chemicals. Check the label of the chemicals used for recommendation on what agent should be used to best clean and neutralize the sprayer components.
  2. To prevent oxidation of components it is always good practice to fill solution system components with some form of antifreeze and spray a small volume through the system (from tank to nozzle). This procedure will prevent elastomer components from “drying out”.
  3. Leave regulators and unloaders in a loose or open state so that they don’t stick on startup and fail the pump.

Kings 3 Point Hitch SprayerGet it Ready

When pulling the sprayer out and getting it ready for operation be aware that the pump is dependent upon the proper functioning of the system components. Perform these three steps to check the system out before going to full on operation.
  • Check maintenance schedule for pump. The best time for maintenance is before the season begins when the system is clear of hazardous chemicals.
  • Cycle unloader valves and pressure regulators to be sure they are not stuck in place. If you feel the component is not free perform service on the component.
  • Check pump to see that it is not stuck. If the pump is driven by a mechanical drive, rotate the pump by hand to check that pump is free. An electrical driven pump that has a closed couple drive should be run in short bursts to determine that pump operating as expected. Always set the sprayer to a low pressure setting for initial startup and check sprayer for leaky joints.
Performing these simple checks early can help you achieve the timeliness of your application when it is needed. 

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Topics: Spray Equipment Maintenance, sprayer, Centrifugal Pump, Roller Pump, centrifugal pumps, roller pumps, sprayer pumps

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