280 Series Stainless Steel Rotary Direction Control Valve For hydraulics in a harsh environment.

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1 280 Series Stainless Steel Rotary Direction ontrol Valve For hydraulics in a harsh environment. he 280 Series is a high pressure, 316 stainless steel, hydraulic rotary direction control valve. It is the ideal solution for control of hydraulic actuators used in arduous environments where internal leakage must be minimised. he valves utilise an optically flat rotary spool with pressure loaded seats, to ensure either zero or near zero leakage (depending on flow size). he 280 Series valve is compatible with water glycol hydraulic fluid. Maximum ressure: Up to 700 bar, 10,000 psi Maximum Flow: Up to 38 lpm, 10 US gpm Operating emperature: Media temperature range -10 to 100, 14 to 212 F orting: Side ported S, NF, or SE Manifold ported 014 O ring on pitch circle diameter (D) Material: Steel components in 316 Stainless Steel body. Nitrile rubber (NR) Seals. Weight: ypically 3.2 kg, 7lbs Mounting: Standard 4 x 5/16 UN holes to fasten screws into valve base anel 4 x 5/16 UN studs to fasten valve into panel Manifold 4 x 5/16 UN through bolts to fasten valve onto manifold Milwaukee, WI 53235, US el: +1 (414) sales-us@webtec.com St. Ives, ambs. E27 3LZ, UK el: +44 (0) sales-uk@webtec.com Features l Over 4000 possible configurations l 3 position / 2 position l 4 port / 3 port l Zero leakage (15 lpm, 4 US gpm version) l Standard documentation:- l Manual l ertificate of onformity l erformance test ertificate l Declaration of onformity to EX l S EN :2009 (EX) rating of II 3G X l S ISO , NF D03 (EO3/ NG06/D03) mounting adapter l Option of manufacture to EN l Express build available (single unit orders) Symbol: e.g 283 ertificate No.8242 Hydraulic measurement and control 280VLVE-U-ENG-3196.pdf 06/16 (Issue 3)

2 Ordering s ypical E 2 F - 2R 3 Valve Model (able 1) orting (able 2) Flow Size (able 3) Valve Options (able 4) osition ype (able 5) ort ype (able 6) able 1: Valve Model able 3: Flow Size Maximum Maximum ressure flow pressure * 2 drop curve 15 lpm 700 bar 0 4 US gpm 10,000 psi 1 2 able 4: Valve Options Symbol able 2: orting (see page 3) L 9/16-18UN #6 SE OR E 3/8 NF * lpm 350 bar 7 US gpm 5,000 psi 38 lpm 207 bar 10 US gpm 3,000 psi * 2 Maximum ank line pressure is 17.2 bar, 250 psi 3/8 S ort size 014 O ring Manifold mount 014 O ring * 1 ll NF threads are to NSI lass 1. s stated in the standard it is recommended that sealing is accomplished by the means of a sealant applied to the thread. N fittings may also be used to connect to NF ports (also with a sealant applied to the thread) Non-interflow Mount ype Handle ype ction Standard anel Manifold * 3 Straight ent Detent Spring * 4 l l l l l l l l l D l l l E l l l F l l l G l l l H l l l J l l l K l l l L l l l M l l l ressure Drop (bar) ypical ressure Drop urve # Flow (US gpm) Flow (lpm) # est onditions: Using ISO32 Oil at 45,113 F, 207 bar, 3,000 psi ressure Drop (psi) * 3 Manifold mount type (selected on able 4) is used only in conjunction with the manifold mount O ring port type ( on table 2) * 4 he spring return action has impaired performance above certain pressures. For flow sizes 1 and 2 its performance is compromised above 207 bar, 3,000 psi. For valve flow size 0 the spring performance is compromised above pressures of 138 bar, 2,000 psi. See able 3: Flow Size. able 5: osition ype osition Options Symbol 3X Standard 3 positions 2R 2 osition, entre & Right only 2L 2 osition, entre & Left only able 6: ort ype ort Options Symbol 4Y 3 3 Standard 4 ports 3 Side orts, port open ( plugged) 3 Side orts, port open ( plugged)

3 orting L, E, & orting orting Leakage between flow paths. losure tests with low pressure air (82 psi) were conducted on Webtec s 280 Series of rotary directional control valves. Flow size 0 with non-interflow was found to have no visually detectable leakage for the duration of the test (60 seconds). Flow sizes 1 & 2 with interflow were found to have a leakage of 1.67x10-4 lpm which equates to less than 1 drop of water every 10 minutes. Note: he performance of the valve in terms of leakage across paths is adversely affected by a reduction in fluid viscosity is a transient effect that occurs on flow size 1 & 2. It occurs as the valve is operated between positions. During this time a small flow from ports, and to port is possible, which can cause the pressure of lines, or to drop slightly. Note that interflow will not occur when the valve is fully seated in either the centre, left or right positions. he magnitude of interflow is highly dependent upon the valve s operating conditions and speed of actuation. If no pressure drop during actuation is permissible then a non-interflow valve should be selected (see able 3, page 2). EX Statement he 280 Series Valve has been designed, manufactured, and tested to the EX directive (S EN :2009), & is rated to II 3G X. Handle osition he handle can be re-assembled through 180 degrees. his minimizes the pitch between banked valves (28mm, 1.1 for straight handle type, 21mm, 0.8 for bent handle type) Left position entre position 28 (1.1) 28 (1.1) * 180 degrees Right position Optional Manufacture & Material raceability ertificate (to EN ) t time of ordering only. S ISO , NF D03 (EO3/NG06/D03) mounting adapter kit his can adapt the 014 O ring Manifold mount type valve (able 2, ) to a S ISO or NF D03 mounting pattern. ontents 1 x dapter plate (316 SS) 4 x socket cap head screw (4 316 SS) 4 x O ring (NR) S ISO NF D03 dapter late 316L 316L Socket cap head screw M5 x 35mm #10-24UN x 1.25 O ring S ISO S Instructions leaflet 280-EO3 280-D03 Maximum pressure 350 bar 3,000 psi Optional Express uild - 7 working-day lead-time vailable on LL single-unit orders, subject to confirmation at time of order, maximum 7 working days from receipt of order to dispatch, surcharge applies.

4 Installation Details Dimensions in millimetres (Inches) SE / NF / S (order codes L, E, ) with standard mount & straight handle 014 O ring (order code ) with panel mount & bent handle Left osition ( to ) 90 otal ravel entre osition Right osition ( to ) See Standard / anel mount template op ap Ø 50.3 (1.98 ) (6.58 ) 35 ent Handle (4.70 ) (4.18 ) 82.0 (3.23 ) (5.96 ) 18.0 (0.71 ) (4.63 ) 4 anel mount studs. 5/16-18UN-2 x 14.2 (0.56 ) (4.63 ) 4 x side ports (SE, NF, or S) 157 (6.18 ) 4 x counter bores supplied with S ISO3601, S O rings (NR) 4 x Standard mount holes 5/16-18 UN-2 x 11mm (0.43 ) deep 4 x 5/16-18UN x 11mm (0.43 ) deep mounting holes See Standard / anel mount template See 014 O ring emplate

5 Installation Details Dimensions in millimetres (Inches) 014 O ring Manifold mount (order code ) 014 O ring manifold mount with 280-EO3 / D03 Kit Some dismantling & re-assembly is required for installation. See 014 O ring manifold mount installation details below. Some dismantling & re-assembly is required for installation. See supplied instruction leaflet (0.95 ) 31.0 (1.22 ) (5.85 ) Supplied with 4 x 5/16-18UN through bolts, washers, & nuts. X = 11.0 (M5) X = 0.31 (#10UN) X 4 x counter-bores with supplied S ISO 3601, S O rings (NR) See 014 O ring template 014 O ring Manifold mount Installation details 4 x counter-bores with supplied S ISO 3601, S O rings (NR) See 280-EO3/D03 emplate 280-EO3/D03 emplate he valve is pre-assembled for test using 4 x 5/16-18UN through bolts, with nuts and washers. Some dismantling is required for installation, during which care should be taken not to allow debris to enter the valve. his requires a 13mm (1/2 ) /F spanner and 13mm (1/2 ) hexagon bit. EO3/D03 pattern erimeter of valve o ensure correct operation, the valve re-assembly tightening torque to be used is 23Nm, 7lbft 35.5 (1.40 ) 014 O ring emplate Standard / anel Mount emplate 4 x Ø8.0 (0.31 ) manifold holes equi-spaced on D 25.4, 1.00 Ø52.0 (2.05 ) required hole for top cap - anel mount only 45 4 x mounting holes equi-spaced on D 67.3 (2.65 ) 45 4 x mounting holes equi-spaced on D 67.3 (2.65 ) Webtec reserve the right to make improvements and changes to the specification without notice