Precision Metering The GRP Flow Control Valve

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Conrad Mosley
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1 Precision Metering The GRP Flow Control Valve Info 202

Clever Solutions Unbeatable Repetition Accuracy Festo s GRP precision flow control valve allows repeatable flow rate settings. Once made, settings can be read easily from the scale and reproduced.

This allows the piston speed of cylinders to be adjusted more accurately than ever before, particularly in the case of very low or varying speeds.

2 Clever Solutions Unbeatable Repetition Accuracy Festo s GRP precision flow control valve allows repeatable flow rate settings. Once made, settings can be read easily from the scale and reproduced. Uncompromising Precision The adjusting knob allows the flow rate of a medium such as compressed air to be controlled conveniently, precisely and steplessly. This allows the piston speed of cylinders to be adjusted more accurately than ever before, particularly in the case of very low or varying speeds. Versatile Product Line The GRP product line offers more opportunities for versatile applications. This precision flow-control valve with optimized control characteristics is available in two variants, with or without a non-return function. Available world-wide from stock. Precision Dosage of Media The precision flow control valve GRP, offers not only outstanding precision but also unbeatable repetition accuracy. The GRP opens up previously undreamed of opportunities for the control of the flow rate of compressed air, other neutral gases and neutral liquids. By simply turning the adjusting knob, you can control flow rate steplessly and almost down to the last drop (low flow). This precision is provided by a plastic disk with a variabledepth groove. This allows very precise control of the flow rate of a medium. The current setting can be read easily from a scale and reproduced easily at any time. And at a price which also bears repetition. GRPs can be found in the food and packaging industry, medical technology, the electronics industry in other words, everywhere that precision is essential. Reduced Installation Costs The PK fitting means that installation can be carried out in an instant. The valves can be mounted as desired either on a mounting plate or in a panel. Mounting plates for one or two GRPs are available as accessories. 2 Festo Corporation Products Subject to change - 6/03

Practical Examples Well Worth Imitating Application 1: Application 2: Application 3: Application 4: Ultrasound Welding On an individual basis which reflects the variety of applications involved,

These intelligent processes produce clean joints with high longterm strength.

3 Practical Examples Well Worth Imitating Application 1: Application 2: Application 3: Application 4: Ultrasound Welding On an individual basis which reflects the variety of applications involved, customer-specific ultrasound technology solutions are developed to allow the welding, riveting and cutting of thermoplastic materials and the embedding of other materials. These intelligent processes produce clean joints with high longterm strength. In the interests of a time-optimized production cycle, it is very important to have accurate control of the air used to obtain the various feed speeds a fast advance followed by a slow lowering and welding process and a fast return. This demanding task is ideal for the GRP and the precise steplessly adjustable control which this provides. Speed Control In The Food Industry Sausage filling is carried out to the gram and in a highly flexible way. A single cylinder is used to fill all kinds of different sausages and in this case weights which are a little over are not all right! A filling machine is linked to an automatic double clip device which precisely seals all types of plastic, fibre or natural sausage skins. The GRP valve provides the perfect fine dosing necessary in order to provide the various cylinder speeds required for the different filling consistencies with the appropriate degree of repetition accuracy. The important factors here are precise adjustment and fast changeover from one sausage product to another. Measurement of Back Pressure Laboratory equipment is required to operate to extremely close tolerances a matter of microns in the case of the proximity measurement of the profiles of flat and shaped plastic packs using a well-proven air sensing method. This was the reason why a manufacturer of these products choose GRP precision flowcontrol valves for use in continuous product monitoring to bring references values to the desired settings. The flow control valves are used to create an air cushion under a needle probe, allowing them to travel over the plastic workpieces without touching them. Thickness values are then recorded by a highresolution displacement encoder system. The back pressure values provide an indication of the thickness of the workpiece material. Reference Pressure Measurement for Quality Assurance with Narrow Bores Medical technology demands total precision. To allow ultra-low pain injections, the fine hypodermic needles of safety syringes are drilled with microscopic 5 µm holes. The relevant test station is equipped with numerous GRP precision flow control valves which allow exceptionally precise examination of the flow rate of the compressed air which is fed through each needle. The pressure of this is then compared with a reference needle. The result of this comparison indicates whether the needle in question has been correctly drilled. Application 2 Application 4 6/03 - Subject to change - Products 2001 Festo Corporation 3

4 Techncial data GRP Precision one-way flow control valve GRPO Precision flow control valve Up to.010 Cv / 10 l/min - GRP-10-PK-3 - GRPO-10-PK-3 Up to.070 Cv / 70 l/min - GRP-70-PK-3 - GRPO-70-PK-3 Up to.160 Cv / 160 l/min - GRP-160-PK-4 - GRPO-160-PK-4 Flow rate:.0001 to.090 Cv / 0.1 to 90 l/min Precision infinite regulation of flow rates for neutral gases and compressed air Accurate reproduction of set values with 300 rotation angle Precision timer in combination with external reservoir Barbed fittings for type PU-..., PL-..., PP-... plastic tubing Panel mounting or mounting plate Accessories The valve allows for precise, reproducible regulation of flow rates, e.g. for controlling cylinder piston speeds. It can also be used as a precision timer in combination with a reservoir. The flow rate for the medium can be infinitely and accurately adjusted by turning the adjusting knob. Settings can be accurately reproduced via the scale. The medium is blocked in the reverse direction with a nonreturn valve over the entire cross section. Mounting plate for 2n for 1 valve APL-2N-GRP mounting frame for 2 valves APL-2N-GRPx2 Part no. / Type GRP-10-PK GRP-70-PK GRP-160-PK GRPO-10-PK GRPO-70-PK GRPO-160-PK-4 Medium Compressed air, filtered 1 µm, lubricated or unlubricated, or neutral gas Design Ring channel throttle Type of mounting On mounting plate 2n or panel mount (installation Ø 0.89 in / 22.5 mm) Connection Barbed fitting for 3 mm plastic tubing...for 4 mm plastic tubing Nominal size 0.06 in / 1.5 mm 0.06 in / 1.5 mm 0.10 in / 2.5 mm Nominal In direction of flow control See flow data flow rate Against the direction.015 to.050 Cv / 15 to 50 l/min.020 to.060 Cv / 20 to 60 l/min.025 to.090 Cv / of flow control 25 to 90 l/min Pressure GRP 1 > 2 0 to 90 psi / 0 to 6 bar range 2 > 1 0 to 90 psi / 0 to 6 bar GRPO 1 > 2 0 to 90 psi / 0 to 6 bar 2 > 1 0 to 7.25 psi / 0 to 0.5 bar Temperature range 15 to 122 F / -10 to 50 C Materials Housing: black plastic, Al, brass, seals: perbunan Weights Valve GRP 0.11 lbs / kg GRP lbs / kg Mounting plate APL-2N-GRP lbs / kg APL-2N-GRPx lbs / kg 4 Festo Corporation Products Subject to change - 6/03

5 Flow data and dimensions Flow rate in relation to throttle setting where p = 1 bar and p = 1 bar Flow Data GRP/O-10-PK-3 GRP/O-70-PK-3 GRP/O-160-PK-4 Nominal flow rate [l/min] Nominal flow rate [l/min] Nominal flow rate [l/min] Throttle setting Throttle setting Throttle setting Precision one-way flow control valve, GRP-... Precision flow control valve, GRPO-... Mounting plate APL-2N-GRPx2 Dimensions (mm) Installation aperture 1 Barbed fitting for plastic tubing x = mm Conversion Factors mm > inches = 25.4 l/min > Cv = x /03 - Subject to change - Products 2001 Festo Corporation 5

6 Advantages The intelligent solutions which the GRP precision control valve provides result in tangible benefits. The gain in precision with the GRP generates both technical and economical advantages. Make a comparison and prove it to yourself! 1. Precision stepless adjustment of flow rate Advantages for designers Precise control opens up wide range of application High accuracy even with low flow rates Choice of variants, with or without non-return function Advantages for buyers Good price/performance ratio combined with exceptional functionality Flexible applications, thanks to product line with choice of three variants 2. Calibrated adjustment knob Easy reproducibility of settings, especially at low end of scale Time saving thanks to fast and precise changeover of piston speeds 3. Easy installation Greater flexibility thanks to choice of mounting options: - Mounting plates - Panel mounting PK fitting means simple installation, saving time and money 6 Festo Corporation Products Subject to change - 6/03

7 Copyright 2003, Festo Corporation While every effort is made to ensure that all dimensions and specifications are correct, any printing errors not rectified are outside the control of Festo, who cannot be held responsible for the same. For Liability and Guarantee conditions, refer to our standard Conditions of Sale, available on request from your local Festo office. All rights reserved. No part of this publication may be reproduced or transmitted in any form or by any means, electronic, mechanical, photocopying or otherwise, without the prior written permission of Festo. All technical data subject to change according to technical update.

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Precision one-way flow control valves GRP

Product range overview and type codes Product range overview Version Valve function Version Type Connection direction Precision one-way flow control valve Metal One-way flow control function Pneumatic