Ehrle’s KD series is a range of cold-water, mobile, high-pressure jet washers. The middle-class range (KD623, KD823 & KD940) offers a lighter-weight pump design that still kicks out impressive numbers, while the super-class range (KD1140, KD1340 & KD1540) features a heavier pump and motor configuration that facilitates ludicrous performance. The KD1540, for example, produces up to 280BAR at 1500 litres per hour. The weight of the KD1540, however, is 77KG more than a KD940. A decision you might like to make, therefore, is whether the weight-to-performance ratio is a concern for your work. 

KD Specifications

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23 or 40?

The numbers of models in Ehrle’s various ranges (including KDs!) are surprisingly intuitive once you see the various specifications. The 23, for example, tells you the pressure washer is a single-phase pressure washer. In other words, it is powered by a standard UK 230V plug supply. The 40, as you might guess, is a three-phase power supply.

There are distinct advantages to each power supply. The 230V for instance is versatile, as many homes and businesses have this form of electric supply. The 415V, three-phase supply, on the other hand, is less common. However, the additional electrical bandwidth means 415V pressure washers can support more powerful pumps and motors.

623, 823, 940, 1140 etc.?

As we have established: 23 means 230V supply, while 40 means 415V supply. But what about the other numbers? Well, these numbers correspond (sometimes more or less loosely) with “discharge capacity”. Or, in other words, the amount of water that can pass through the pressure washer over a given unit of time.

623 means that the KD623 can pass up to 600 litres per hour. The same is true for the KD1340 and KD1540s, which can pass 1300 and 1500 litres per hour respectively.

The KD823 and KD940 are slightly different so that they can be differentiated from past models. For example, the KD823 produces 720 litres per hour, while the KD940 passes 840 litres per hour. The older 723 model and 840 models produced inferior pressure performance and discharge capacity. So, while a little deceiving at first, the number change is to highlight a performance progression in both models, despite using the same power inputs. In other words, it highlights increased cleaning performance.

Pressure vs Discharge Capacity

Looking at the specification table for the KD range, you might expect the numbers for pressure and discharge for each model to increase linearly upward, but they don’t. Why do they not increase linearly?

As you will see, some numbers decrease while others increase as the KD model number rises. Essentially Ehrle, like many companies, configures each model slightly differently so that it may perform in a complementary manner to another model in the series. For example, the KD623 outperforms the KD823 in operating pressure. However, the KD823’s discharge capacity is superior. A similar comparison can be drawn between the KD1140 and KD1340. When might you want more pressure or more discharge capacity?

Ideally, you’ll probably want as much pressure and discharge capacity as you can get for your money and setup (unless you’re cleaning something more delicate!). However, for comparison (and argument's sake), we could simply sum up the operating pressure as being the jet washer’s capacity to break up dirt and grime. And the jet washer’s discharge capacity is its ability to wash the dirt away. The discharge rate can also increase the span or diameter at which the pressured water can be applied.

Both pressure and discharge, therefore, can lead to different kinds of efficiency. Pressure can be more efficient as you may only need to pass over dirt once or twice to have broken it up. Whereas, discharge capacity may allow you to clean a wider surface area in a single pass.

The nuances of advantage between pressure and discharge capacity vary from context to context. They also become more subtle as the power of various washers increases. We recommend, therefore, getting in touch (via Facebook Messenger, phone (01652) 659759 or by email at ) regarding your situation and needs.

Who needs an Ehrle KD?

The various KD models are key members of our long-term hire fleets. Versatile and ergonomic, they are suitable for many of the industrial and commercial needs our customers require. For instance, the KD range is just as popular with hauliers as it is with Nurseries, farming and food manufacturing businesses.

The main considerations, therefore, are one of mobility and temperature. For instance, it may be advantageous (or even necessary!) for some businesses to use hot water steam cleaners as opposed to cold water pressure washers. Moreover, the need for a mobile pressure washer or a static.

Hot vs cold (KD vs HD or HSC)

Taking into account cleaning alone, there is no denying the superiority of hot water steam cleaners. However, when one considers wider issues, hot water machines can become less desirable for many reasons. For one, hot water washers tend to be heavier. Second, they are less energy-efficient and often require diesel to power their heating units, as they would draw too much electrical power otherwise (unless on a three-phase supply).

Taking these factors into consideration it might be that hot water cleaning is superfluous to your needs. Therefore, why not take advantage of our 25+ years of experience supplying pressure washers and steam cleaners? Share your problems and we will share our solutions via Facebook Messenger, the phone (01652) 659759 or by email .

Mobile vs Static (KD vs HSC or KS)

Many assume that mobility is best, providing greater utility. However, this is not always the case. The advantage of a KD is that they are incredibly nimble. However, the HSCs can become centralised cleaning hubs for your business, storing cleaning equipment in a fixed location.

The main thing to consider here is where and how you will be using your pressure washer? Will you be needing to cover a sizeable area? The recommended max length of hose we recommend for an HSC is 40m before the performance starts to diminish. 40m is a decent range, but is it long enough? If not, then a mobile washer will be a better solution.

Again. Why not take advantage of our 25+ years of experience supplying pressure washers and steam cleaners? Get in touch via Facebook Messenger, the phone (01652) 659759 or by email .

Standard or Premium?

In the Ehrle HD range, the distinction between standard and premium is less than with the KD series. In the KD range, the difference extends to the functionality of the pressure washer. For example, the integrated tank in KDs differs between standard and premium models.

In the standard model, the integrated tank is for chemicals and does not boast a chemical metring valve. The lack of a metering valve means a chemical application can only be done at low pressures.

In the premium model, the integrated tank is for water. Moreover, the premium model boasts a chemical metering valve that allows the user to inject as much or little chemical into the system as they would like. It also allows the user to apply that chemical at high pressures too, aiding cleaning further.

The premium model also comes with a few more handy peripherals. For instance, the premium KDs come with a longer hose (15m instead of 10m) and an integrated hose reel for storage. They also come with two lances, rather than one. The standard KD lance is a Vario-nozzle, while the premium has a Nozzle-protection and Rotary-nozzle lance. 

Reconditioned washers

As a staple of our hire fleets, Ehrle KDs are regularly cycled and replaced by new machines. When this happens we frequently recondition the retrieved machines, replacing all the main parts and seals. Typically, these replacement parts come with warranties and the machines work as if new. 

The availability of reconditioned machines is not constant. However, when available they can be a cost-effective means of acquiring an Ehrle KD.

Get in touch / Find out more

If you would like to learn more about the KD range, ask for advice regarding your cleaning needs or discuss the purchase of a KD823, then please do not hesitate to get in touch with us either by using Facebook Messenger, or the phone (01652) 659759 or by email .

Specification Comparison

See how the different KD models compare.