Fixed-orifice, 旁通/限流, priority flow control with relief 安装组件

Function

Function for YFEG
Port Designators [ + ]
Modifiers Ports
C, C/S Ports EF & P: 1/2" NPTF; Ports CF & T: 1/2" NPTF; Gage Port: 1/4" NPTF;
D, D/S Ports EF & P: 3/4" NPTF; Ports CF & T: 1/2" NPTF; Gage Port: 1/4" NPTF;
K, K/S Ports EF & P: SAE 10; Ports CF & T: SAE 10; Gage Port: 1/4" NPTF;
L, L/S Ports EF & P: SAE 12; Ports CF & T: SAE 10; Gage Port: 1/4" NPTF;
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技术特性 [ + ]

This assembly consists of a bypass/restrictive, fixed-orifice, priority flow control which takes an input flow at port P and uses it to satisfy the priority flow at port CF. If the input flow exceeds the priority flow requirement, the excess is bypassed out port EF. The bypass flow may be used in a secondary circuit. The relief valve protects the controlled flow from over-pressurization, relieving excess flow out of port T.

  • The sharp-edged orifice design minimizes flow variations due to viscosity changes.
  • Customer must specify a flow rating. Factory set flow ratings are within +/- 10% of the requested setting.
  • Both priority and bypass flow are usable up to the system operating pressure.
  • Bypass flow is not available until priority flow requirements are satisfied.
  • Pressure at the bypass port (port EF) may exceed pressure at the priority port (port CF).
  • Maximum pressure at the priority port should be limited to 3000 psi (210 bar).
  • Relief model RPEC is adjustable within 100 to 3000 psi (7 - 210 bar) with a factory setting of 1000 psi (70 bar).
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技术数据 [ + ]
阀块类型 管式安装管式安装
通流能力 30 gpm120 L/min.
控制流量范围 0 - 12 gpm0 - 12 gpm
安装孔直径 .41 in.10,4 mm
安装孔深度 ThroughThrough
安装孔数量 22
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常见问题 [ + ]
How big is a drop of hydraulic oil?  

There are exactly 250 Sun drops in a cubic inch or 15 in a cc.

Why doesn't Sun anodize their aluminum bodies?

Reasons to anodize:

  • To increase corrosion resistance. Sun uses 6061-T651 aluminum. It is one of the most corrosion resistant aluminum alloys there is. Whether or not anodizing improves the corrosion resistance of 6061 aluminum is debatable. We have yet to have a manifold returned because of corrosion.
  • Appearance (color). The 2 colors that would appeal to Sun would be blue or black. Unfortunately these are the colors that are hardest to do consistently.
  • To provide a hard wear surface. Sun does not make parts-in-body valves. The manifold is just plumbing. We don't need a wear surface.
  • Because everyone else does it. Bad reason. 

Reasons to not anodize:

  • Cost. It's another process.
  • Logistics. When you make tens of thousands of manifolds a month and you anodize hundreds, it's a problem. Consistency. See above.
  • Stamping. After a body is anodized you cannot do any more stamping without making a mess.
    Inspection. Have you ever tried to look for burrs in a black anodized body? It's the old blackboard factory at night scenario.
  • Torque. You will experience an increase in breakaway torque when removing items from an anodized manifold.
  • Fatigue life. This is the best reason to not anodize. Fatigue failure is a very complex phenomenon. What it takes to initiate a crack is difficult to predict. What it takes to propagate a crack is readily defined. Anodizing produces a very thin, very hard, and very brittle surface on aluminum. The first time you pressurize an anodized aluminum manifold you have initiated fatigue cracks. Whether or not the stress is enough to propagate the cracks is a matter of pressure and manifold geometry. Anodizing an aluminum manifold grossly reduces the fatigue life by anywhere from 20% to 50%.
Direct acting, pilot operated, what do I use?

Direct acting valves are used to prevent over pressure and pilot operated valves are used to regulate pressure. If you are unsure, use a direct acting valve. Sun's direct acting valves are very fast, dirt tolerant, stable, and robust. Sun's pilot operated valves are moderately fast, they have a low pressure rise vs. flow curve, and they are easy to adjust.

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备注 [ + ]
  • Important: Carefully consider the maximum system pressure. The pressure rating of the manifold is dependent on the manifold material, with the port type/size a secondary consideration. Manifolds constructed of aluminum are not rated for pressures higher than 3000 psi (210 bar), regardless of the port type/size specified.
  • For detailed information regarding the cartridges contained in this assembly, click on the models codes shown in the Included Components tab.
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额外来源 [ + ]
集锦
技术信息
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