Customer Survey Results 2022

At Rotec, we continuously strive to deliver excellent quality and customer satisfaction. We aim to encourage customer feedback so that we may celebrate successes and learn from any suggestions for improvement.

As we approach the end of 2022, we recently analysed our Customer Feedback Survey results received during the last 12 months. Customers were asked to rate key variables out of 5 stars, including Rotec’s customer service, pricing, lead & delivery times, technical support and communication.

The results are in…

126 completed surveys were recieved in the last 12 months. The average number of stars given (up to a maximum of 5) for each category were as follows:

  • Customer service – 4.7 stars
  • Lead & delivery times – 4.7 stars
  • Technical support, advice and guidance – 4.6 stars
  • Quality of service – 4.3 stars
  • Communication – 4.2 stars
  • Pricing – 3.8 stars

We were also pleased to have received numerous comments from customers throughout the year. Examples include;

“Thank you to your team for their fast response.”

“Rotec have always delivered a high quality of service. Always thorough and communicate well. Thank you.”

“Fast delivery. Products as described. Would use again if I need a part quick.”

“Very competent engineers. Would recommend.”

“Quick response and knowledgeable team. Perfect service. Thank you.”

“Rotec are always happy to help and provide great customer service. Thank you.”

100% of customers awarded us 4 or 5 stars when asked how likely they would be to recommend Rotec’s products or services. 

One client wrote;

“Rotec helped us to complete a complex project which had many challenges. Despite barriers to completion, Rotec was able to offer solutions and overcome the challenges. We are very happy with the result and more than happy to work with Rotec again.”

Mark Conniff, Rotec’s Operations Manager reflected on the survey results,

“This outstanding set of feedback received during the last 12 months is testament to the dedication, expertise and the ethos of our team here at Rotec Hydraulics Ltd. From engineers on-site and in the workshops, to those in the warehouses and our offices, we are all committed to placing the customers’ needs first and these results reflect this.”

If you would like to start your next project with Rotec, view our services and products on our website or get in touch.

Choosing the correct hydraulic filter

Filtration is undeniably one of the most important components in any hydraulic system. Choosing the correct hydraulic filter can increase a machine’s life expectancy and  lower the risk of expensive component damage.

Establishing the Target Cleanliness Level

We recommend identifying the most sensitive component in your system and learn the filtration cleanliness level (or micron rating) for that component. This is often a variable piston pump or the proportional valve. By using a recommended cleanliness code chart, you can determine the ISO code for a range of the most critical components such as pumps, valves, actuators, and more. From this ISO code, you can select the appropriate filter from your preferred manufacturer’s catalogue. Contact our team if you are unsure.

Achieving Target Cleanliness

There are generally four major factors in positioning contamination control devices in a hydraulic or lubrication system to achieve the target cleanliness level that is required.

Initial filter element efficiency

Filter element efficiency under system stress

Location and sizing of contamination control devices in the system

Filter element service life of the system

While all of these factors are important, filter manufacturers (such as Parker, Eaton and MP Filters) typically design their filters for maximum efficiency, so you have more responsibility to ensure the location and filter sizing is correct to increase the longevity and reduce maintenance damage to your hydraulic system. When done correctly, this will give the best service life of a system.

Selecting The Right Filter Type

Suction filters are usually put in a tank to filter out any large items, such as bolts or rags that may have dropped in the reservoir. They are not generally used for filtering your fluid to the required ISO code.

Pressure filters come highly recommended because they are placed after your pump, so if the pump was to fail, all of the components downstream would still be protected. These filters must be rated for your system’s running pressure and ISO code.

Return filters are important because they clean the oil before it returns to your hydraulic reservoir and therefore keep your reservoir clean and free from dirt particles. Return line filters are generally used in open-loop applications and should be rated at the ISO code that your system requires.

While all three filter types are generally not needed in the same system, it is important to have at least one pressure filter or one return line filter in every application to maintain the fluid cleanliness level that hydraulic components require.

Selecting The Right Filter Size

Once you determine what type of filter to use, you must consider the pressure drop through the filter. In most cases, pressure filters and return filters have a bypass that protects the system when the filter gets clogged or plugged. It allows the oil to go around the filter element and allows the system to run even though it’s not being filtered. Do keep in mind that your system would be running unfiltered with this setup.

As your filter becomes dirtier, it requires more pressure to push the oil through the element because it is clogged with dirt and debris. Once the pressure required reaches a certain point it becomes inefficient and starts wasting horsepower in the hydraulic system; this is the reason for the bypass. Typically, bypass settings on pressure filters are 40-50 PSI to limit this inefficiency.

When sizing a pressure filter, generally we would like to keep the pressure drop through the filter under 10 PSI. This gives your filter more time to get to the 50 PSI bypass setting, thus increasing the length of time between element changes. If you size your filter with a 25 PSI pressure drop you are already at half of your filter life (assuming 50 PSI bypass). If we selected a filter that only had a 10 PSI pressure drop, your filter will have 40 PSI of pressure drop before it reaches bypass setting, thus, allowing the element to last longer before needing service or be replaced.

Another consideration is oil viscosity. Thicker oil will cause a higher pressure drop, so you need to know what oil you are going to run in your system to truly size the filter correctly and get the best filter life for your application.


Effects Of Hydraulic Oil

Choosing the correct filter is only part of the equation. New hydraulic oil straight from the drum has a typical cleanliness level of ISO 4406 23/21/18. From what we learned above you can see that this is 16-64x dirtier than what most hydraulic systems require (each single number increase in the ISO code is double the contaminant level for that micron size)! To put it another way, a 25 GPM pump operating continuously in hydraulic oil at 23/21/18 will circulate 3,500 pounds of dirt to the hydraulic system’s components each year.

Extend Filter Life By Using Clean Hydraulic Oil

To add hydraulic oil, and not the dirt, always filter new oil prior to use in a hydraulic system. This can be done in a number of ways. The most common way is to use a filtration cart or kidney loop filter in your reservoir. Schroeder makes an exceptional filter cart that can not only remove dirt particulates from new oil, but also water, if needed. Carts like these offer great value for your investment, as they range from relatively low cost to expensive, depending on what you are trying to accomplish. Also, if you are already running Schroeder mobile filtration on your machine, then there is a good chance you can use the same filter element that you already use, thus reducing inventory parts.

Another way to pre-filter your hydraulic oil is by pumping the oil into the hydraulic reservoir through the system’s return filter. The easiest way to do this is to install a tee in the return line and attach a quick-connector to the branch of this tee. Attach the other half of the quick-connector to the discharge hose of a drum pump. When hydraulic oil needs to be added to the reservoir, the drum pump is coupled to the return line and the oil is pumped into the reservoir through the return filter. Benefits of this method include reduced spills and prevention of ingress of external contamination.

While many people don’t even think about filtering new oil, it is very important to get clean oil into the system. It is much easier to prevent dirt from getting into a system by using precautionary measures than it is to remove dirt from a hydraulic system. Once the dirt ingresses, it is very difficult to get the system clean.

When To Change Hydraulic Fluid

Maintaining the hydraulic fluid in your machine is an important consideration when choosing and extending the life of hydraulic filters. It’s challenging to set an expiration on hydraulic fluid introduced into your system, even under ideal circumstances. Over time even well maintained oil will wear out, however here are a few factors that affect hydraulic fluid and when filter changes are more than likely necessary.


Contamination, in the context of having to change your hydraulic fluid, means you have debris in the fluid than the filtration system can reasonably remove. This is usually some sort of particulate contamination event that overruns the system’s onboard filtration. This can also include contaminating situations such as getting water mixed into the fluid (looks cloudy) or mistakenly topping off your hydraulic reservoir with the wrong fluid. It may be possible to salvage your particulate or water contamination situation using some sort of off-line filtration asset.


This one is simple. If you get your fluid gets too hot, it breaks down. Most of the time you know it got too hot because it becomes darker in color and it doesn’t smell right. It usually doesn’t take the time and expense of a fluid sample analysis to figure this one out. Heat accelerates the condition called oxidative degradation.

Oxidative Degradation and Additive Depletion

This one is a little more complex and will require a fluid analysis to determine. By performing routine fluid analysis a degradation or depletion trend can be spotted before it becomes a mechanical maintenance event.

A hydraulic oil’s oxidative degradation is determined by its Total Acid Number or TAN. As the name implies, this is the absolute measure of the total acid number in the fluid. Over time, oxygen will combine with the hydrocarbon molecules of the oil and a chain reaction occurs. This action results in some obvious conditions like darkened oil, varnishing, and sludge. Some conditions that are not so obvious are increased viscosity, increased foaming, and retained air.

A hydraulic oil’s additive depletion is determined by comparing the used oil’s elemental analysis to the baseline of identical new oil. For example, zinc is an antioxidant and anti-wear additive. Over time it gets depleted, so it’s important to check the concentration of zinc in your current oil to the concentration of zinc in the same new oil.

Rotec’s technical experts have many years of experience in applying the right components for maximum effectiveness and overall lower total cost of ownership. They can help you to improve efficiency and save money over the life of your equipment. Contact our team today for help in finding the correct filter and oil for your hydraulic system.

Rotec Hydraulics Ltd announces SC21 Accreditation

Rotec Hydraulics Ltd is pleased to announce it has achieved SC21 accreditation, an industry recognised standard.

SC21 is a continuous supply chain improvement programme for the UK aerospace and defence sector industries.

 Endorsed by the major UK aerospace and defence organisations, including the Ministry of Defence, the SC21 accreditation is a formal recognition process which reflects Rotec’s contribution and commitment to its supply chain.

To achieve an SC21 accreditation, Rotec’s multi-skilled operational team had to commit to achieving and maintaining a set of standards and improvement frameworks to supply chain development.

Paul Prouse, Rotec’s Managing Director said,

“Here at Rotec Hydraulics Ltd, we pride ourselves on the quality performance and delivery of all our products and services. We are committed to successfully meeting our customers’ requirements and providing exemplary customer service.

Rotec Hydraulics Ltd offers a wide range of engineering services and products to high profile clients across the aerospace and defence sectors. Achieving the SC21 accreditation is testament to the team and their determination to continually improve the business to meet the challenges of the markets in which we operate. It is a standard that we are very proud to have reached.”

Rotec has a long history of providing engineering services to both the aerospace and defence sectors. Capabilities include onsite installation and commissioning, electronic control systems, diagnostics equipment and training packages. The business specialises in bespoke test rigs, flushing rigs and hydraulic power units featuring total system integration.

Find out more about the services Rotec offers at

Rotec delivers outstanding customer service

100% Achilles audit _Rotec Hydraulics Ltd

Rotec Hydraulics Ltd places great value on customer feedback and satisfaction. The team continuously aims to improve and deliver an excellent client experience.

Recently we analysed our Customer Feedback Survey results received during the last 12 months. Customers were asked for their own evaluation of Rotec’s quality, pricing, lead & delivery times, technical support and professionalism.

The results are in…

We are pleased to announce that 97% of customers were either ‘very’ or ‘extremely’ happy with our products and services and would recommend us. Customer comments included;

“Perfect service.”

“Quick response and always helpful whenever I have an issue.”

“Very professional and always happy to help.”

“Efficiency is the key and Rotec is efficient.”

“Fantastic communication from start to finish.”

“Very quick response, happy to request a price again and recommend to others.”

 Over 96% of customers rated our technical knowledge and support as very good or exceptional and 90% described our lead and delivery times as above average. A further 96% of customers described our pricing as fair, compared with similar suppliers.

One client wrote;

“Rotec’s workmanship and quality of service was excellent. [They are] very professional, more than happy to help and upfront regarding lead and delivery times. Everything delivered was as described and on time. Rotec’s ability to be proactive and overcome issues was particularly impressive.”

If you would like to start your next project with Rotec, view our services and products on our website or get in touch.

Meet our External Sales Team

Adam Doney

Adam has been with Rotec just over 8 months. Previously, he worked for a hydraulics company in Falmouth for 12 years, working his way up from the trade counter to sales manager and board member, overseeing all company sales, purchasing and manpower, before moving onto a challenging new project managing a large system build for an offshore client. Adam’s extensive experience of working in the hydraulics industry across a variety sectors including marine, MOD, superyachts and offshore has made him a valuable addition to Rotec. 

Adam decided to join Rotec as it gave him the opportunity to immerse himself in the part of the job he enjoys the most, which is getting out and meeting people. In his spare time, Adam coaches his son’s rugby team at Penryn RFC, kayaks and enjoys listening to podcasts when out on the road.

Dale Lockart

Dale joined Rotec in September, which makes him the newest edition to the Sales team.

Previously, Dale spent 7 years as a Service and Installation Manager with a hydraulic systems company in Gloucester, looking after a small team of service engineers, dealing with customers on a regular basis and quoting for work. Prior to that he spent some time in New Zealand with a hydraulics company covering a variety of roles from component sales to CAD drawings and hands-on service work, before moving to the UAE supervising a machine shop in a ship yard.

Dale was excited to explore and develop the opportunities for Rotec’s services in and around Gloucestershire. He was attracted to working for a privately owned company with a family feel, as opposed to a larger corporation.

In his free time Dale enjoys spending quality time with the family, photography as well as the occasional DIY project on the house.

Date: 18/11/2019

Author: Sarka Humpolcova


Welcome Steve

Steve Smith - Sales Depot Assistant, Stroud

Previously Storeman for a diesel system’s company, Steve joined Rotec at the beginning of July. He was attracted to the Sales Depot Assistant position because of the variety it offers. The combination of hands-on-work and office based responsibilities appealed to him and he decided to apply.

Steve is a self-proclaimed football fanatic and a staunch Liverpool supporter. He used to train with the Forest Green Rovers and continues to play 5x a week with a variety of local amateur clubs. He also mentors his younger brother, who qualified for the Aston Villa under 18s.

Steve likes to keep busy and enjoys spending time outdoors climbing and loves hitting the board – whether it be skateboarding, snowboarding and kite boarding.

After spending a week at our HQ in Taunton, getting hands on with a variety of hydraulic equipment and learning about our products and services, Steve joined our Stroud depot. His great attitude, strong IT background and technical aptitude make him a valuable addition to the small but busy team.

On behalf of the Rotec team, I would like to extend a warm welcome to Steve!