AMF Catalogue Hydraulic clamping systems Page 285
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Check valves No. 6916-08 Article no. Order no. Check valve, hydraulically pilot operated CAD max. operating pressure 700 bar. 60491 Q Differenz p at flow [l/min] [bar] 15 8 6916-08 Releasing ratio PA(B) / PZ Ambient temp. [°C] Aperture pressure [bar] Weight 2,7 -30 - +80 0,2 - 0,3 400 [g] Design: Housing made of steel, surface galvanized. Spring-loaded ball acting as a valve element. The control connection is damped by a throttle. Z control pressure p St (bar) Diagram: for release (pB = 0 bar) Operating pressure pA (bar) pressure at A No. 6916-08-10 Article no. Order no. Check valve, pilot operated for O-ring connection, max. operating pressure 700 bar. CAD Q Releasing ratio PA(B) / PZ Ambient temp. [°C] OR-1 O-ring Order No. OR-2 O-ring Order No. Weight 3 -40 - +80 183335 457499 300 [l/min] 339374 6916-08-10 20 [g] Design: Complete with four fastening bolts M4 x 25 - 8.8. Spring-loaded ball seat valve for plate assembly, leak oil free. Components made of steel. The connection channels must be self-produced using connection plates. Sealing is with O-rings. Nomenclature of the connection ducts: A = consumer, B = pump side, Z = control, L = leak oil (relief of the vacuum piston chamber) Application: For unhindered flow in one direction and blocked flow in the other direction. The blocked direction can be controlled via a control connection. The valve is used for the leak oil-free pressure maintenance on hydraulic consumers in combination with leak oil-containing directional spool valves or leak oilcontaining media penetrations. Note: Max. perm. pressure at connections A, B = 700 bar, Z = 250 bar. Connection L must be positioned without pressure relative to tank. The minimum pressure for keeping the connection open is calculated from the formula pst = a x Δp + b x pB + c! Coefficients for valve 6916-08-10: a = 0.235 / b =0.03 / c = 4.8! Δp = Flow resistance and pB = pressure at connection B, see diagrams. Drilling template device: 10 125 Control pressure (bar) 150 Flow resistance (bar) 12 8 6 B->A 4 A->B 2 0 100 75 50 25 2 4 6 8 10 12 14 16 18 20 0 Volume flow Q (l/min.) 50 100 150 200 250 300 350 400 450 Pressure p (bar) Subject to technical alterations. ANDREAS MAIER GmbH & Co. kg ∙ Phone: +49 711 5766-196 ∙ Web: www.amf.de Hydraulic clamping systems 285
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