FAQ's |
What are your credit terms?
What delivery times can you provide?
Do we have to have an account to place an order with you?
What do we have to do to set an account up?
What are your terms and conditions of sale?
What is your pricing policy?
Do you have distributors?
What if I am located in a country with no current distributor?
Where are you located?
What is your warranty period?
Can you assist sizing a motor or gearbox?
What questions will you ask when sizing a motor or gearbox?
What if I do not know the torque or power requirements?
Where can I find your technical information?
Can I order a printed sales catalogue?
What is axial load?
What is radial load?
Can more than one motor be operated from a single control?
Which gearheads are self-locking?
What is meant by the term self-locking?
Is an adjustable speed system ever appropriate for a single speed application?
Can single speed motors and gearmotors ever be operated as variable speed?
Can continuous duty motors / gearmotors be used intermittently?
Which motors/gearmotors are electrically reversible?
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| Q: What are your credit terms? |
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| A: It depends on whether you are an existing credit customer or a new
customer having never traded before with us. For existing credit
customers, we generally offer 30 days credit from date of invoice. For
new customers, we prefer to trade on a pro-forma basis for the first
order, thereafter we can consider credit terms. In the case of
pro-forma, we can accept either cheques or Visa, MasterCard or Switch
credit/debit cards. Once we have granted a credit account, as far as
credit limits are concerned, we usually take reference from leading
credit agencies such as Dun and Bradstreet. |
| Q: What delivery times can you provide? |
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| A: We carry a considerable amount of finished stock across the whole range
of products. If we have stock at our Bournemouth manufacturing site, we
can generally provide a 3 - 5 day delivery. If we have to manufacture
the product, our delivery times vary from 3 - 6 weeks, depending on the
specific design. If faster deliveries are required, we will do anything
in our power to deliver quicker; in fact, our various distribution
partners such as Brammer often carry stock and offer 24-hour delivery
times. In the event that you have placed your order and require an
improved delivery time, the best course of action is to call our
Customer Service Team on +44 (0)1202 512575 and discuss directly. |
| Q: Do we have to have an account to place an order with you? |
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| A: No. We accept all Visa, MasterCard and Switch credit cards and can set
a pro-forma account up in minutes. Simply call our Customer Service
Team who will be pleased to help. |
| Q: What do we have to do to set an account up? |
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| A: Simply e-mail, fax or call us with two trade references and one bank reference and we will take it from there. |
| Q: What are your terms and conditions of sale? |
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| A: Please click here to download the Terms and Conditions PDF. |
| Q: What is your pricing policy? |
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| A: We offer a simple but effective quantity based price policy - the
higher the quantity you purchase, the lower the price. Our standard
price list covers quantity breaks from 1 piece through to 1000 pieces.
We ask any customer with quantity requirements greater than 1000 pieces
to discuss directly with us. |
| Q: Do you have distributors? |
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| A: Yes, 23 in all. In the UK we sell direct and also via three key
distribution partners, Brammer, RS Components and Parvalux Midlands. We
are also represented overseas in key regional areas with
long-established distributors. Our distributors receive ongoing
training here in the UK and are fully conversant with all existing and
new Parvalux products. |
| Q: What if I am located in a country with no current distributor? |
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| A: If you happen to be a region not currently serviced by one of our
distributors, please contact us directly here in the UK. We have
extensive experience of selling internationally and we can normally
manage the whole process of sale quickly and efficiently. |
| Q: Where are you located? |
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| A: Our headquarters are based in Bournemouth, UK. Our location is based to
the north of Bournemouth on the Wallisdown Road. For map and
directions, click here... |
| Q: What is your warranty period? |
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| A: Our products are guaranteed for a period of 24 months from date of
invoice against electrical breakdown or mechanical failure resulting
from defective materials and/or workmanship providing the breakdown or
failure is not due to misuse or operation under adverse conditions
(including use with non-Parvalux approved controllers). Any unit
proving faulty and covered by the provisions of this guarantee must be
returned to our works complete, carriage paid, for examination when it
will be repaired or replaced at our option. Units that have been
dismantled in any way or if the nameplate is damaged or removed will
invalidate the guarantee. Please note that carbon brushes, capacitors
and flexible cables are not covered by this guarantee. |
| Q: Can you assist sizing a motor or gearbox? |
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| A: Yes, we would be pleased to help. We are able to provide help through
our Customer Service Team or through one of our Business Development
Managers who will be pleased to visit and discuss your application.
Many of our team have over ten year's application expertise within
Parvalux and have worked with customers across a huge number of
different applications. Our advice and assistance is generally provided
free of charge and in good faith, however, we do not take ultimate
responsibility for selection and you should always check selection and
or/obtain a second opinion if in doubt. To contact our Customer Service
Team, please click here. |
| Q: What questions will you ask when sizing a motor or gearbox? |
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| A: We start first with a general overview of your application - the type
of machine or product you are designing or using. We will ask you for
information such as the speed required (revs/min), the torque required
(Nm), the type of electricity supply (AC single, three phase or DC),
the voltage that is required, the shaft orientation (in-line or
right-angle), the operating conditions (stop/start or continuous) and
the overall environmental and physical conditions. |
| Q: What if I do not know the torque or power requirements? |
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| A: In some applications, our customers may be changing from say, a
hydraulic motor to an electric motor. In such instances, we can help by
calculating the theoretical torque / power requirements using our
specialist know-how. Generally we are able to help customers size their
motor for almost every type of application. |
| Q: Where can I find your technical information? |
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| A: We publish our technical data on our web-site www.parvalux.co.uk. Here
you will find the CAD drawings, data tables and general operating
criteria in full. Full documentation is available in PDF format, again
from our web-site. In addition to individual PDF pages, we offer our
sales catalogue as a complete PDF download. If you cannot find what you
are looking for, please contact our Customer Service Team. |
| Q: Can I order a printed sales catalogue? |
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| A: We provide our sales documentation in PDF format only. With over 4 new
product line and product line extensions annually, we find it simpler
and easier to inform customers by offering "up to the minute" on-line
sales catalogues. In this way, we can keep you informed of any new
product or product change instantaneously. However, should you wish to
print one of our sales catalogues, our on-line downloads are instantly
printable with an ordinary desktop printer. Should you require a high
resolution PDF, we will be happy to help. |
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A:
Axial load is a force on the output shaft into or out of the motor or
gearmotor. It is shown as Fa in the diagram above. Exceeding the
allowable axial load for a motor or gearmotor will cause premature wear
on output shaft bearings and gearing or even mechanical failure. |
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| A: Radial load is a force pushing or pulling the side of the output shaft.
It is shown as Fr above. Exceeding the allowable radial load for a
motor or gearmotor will cause premature wear of output shaft bearings
and gearing and could cause the shaft to break. Fr may be the result of
a weight on the shaft, belt tension or torque transmitted through a
belt, chain, gear, or certain flexible couplings. A permissible radial
load (Fr) is shown for each motor and gearmotor. In calculating these
values, the following assumptions were made: The radial load is the
worst case direction, i.e. pushing or pulling the shaft sideways. The
motor or gearmotor is delivering rated torque. The radial load was
applied at distance "d" from the hub or mounting surface. Higher radial
loads may be applied closer in on the shaft. Lower radial loads are
permitted further out on the shaft. Flexible couplings are often used
to avoid radial load. Most flexible couplings are designed so that they
do not transmit radial load, however this should be verified with the
coupling manufacturer. |
| Q: Can more than one motor be operated from a single control? |
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| A: Operation of more than one motor from a single control is not normally
recommended. However, when the cost is a primary concern, a multiple
motor/single control system with either permanent magnet motors and
control, or 3 phase motors and control, may be successfully
implemented. More than one permanent magnet motor may be operated with
a single permanent magnet control as long as the sum of the motor
currents does not exceed the rated output current of the controller.
Comprehensive testing is recommended because this type of system may
produce fluctuation or drifting speed output. More than one three phase
motor may be operated with a single three phase control. Motor speeds
should not fluctuate as long as the motors are not overloaded and the
sum of the motor currents does not exceed the rated output current
control. |
| Q: Which gearheads are self-locking? |
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| A: Parallel shift gearheads and right angle gearheads with low ratios are
generally not considered to be "self-locking". Right angle gearheads
with ratios greater than 25:1 are often considered to be
"self-locking". They will resist movement up to their torque rating. As
the gearing nears the end of its useful life or it is subjected to
overload conditions, it may wear to the point where it is no longer
"self-locking". Self-locking gearing is not a recommended method for
preventing movement in applications where the movement may cause injury
or damage. An external brake is recommended for those applications. |
| Q: What is meant by the term self-locking? |
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| A: Self-locking refers to the tendency of some gearing to resist movement
when the gearmotor is at rest and the load is attempting to move. An
example of this is a load on a conveyer belt trying to drive the system
backwards. |
| Q: Is an adjustable speed system ever appropriate for a single speed application? |
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| A: Adjustable speed systems are sometimes appropriate for single speed
applications. If the desired speed is not known or offered in a single
speed product, an adjustable speed system may be set to a desired speed. |
| Q: Can single speed motors and gearmotors ever be operated as variable speed? |
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| A: Three phase and some Permanent Split Capacitor designs may be operated
as variable speed with our frequency inverter. Commutator motors can be
operated as variable speed using a thyristor controller. |
| Q: Can continuous duty motors / gearmotors be used intermittently? |
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| A: All rated torques shown in this catalogue are for continuous operation.
Continuous duty products can be used intermittently. Operation at loads
higher than the nameplate ratings is possible for short periods as long
as there are rest periods for cooling. Loads must not exceed the
mechanical rating for the gears without consulting our sales engineers.
The temperature of the motor should be monitored during testing to make
sure it is not overheating. |
| Q: Which motors/gearmotors are electrically reversible? |
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| A: All motors and gearmotors in this catalogue are reversible. (except shaded pole). Some require a full stop before reversing. |
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