Accumulator discharge assembly


Function for YCFE
Port Designators [ + ]
Modifiers Ports
A, A/S Ports P, T, A1, A2: 1/4" NPTF;
B, B/S Ports P, T, A1, A2: 3/8" NPTF;
C, C/S Ports P, T, A1, A2: 1/2" NPTF;
D, D/S Ports P, T, A1, A2: 3/4" NPTF;
I, I/S Ports P, T, A1, A2: SAE 6;
J, J/S Ports P, T, A1, A2: SAE 8;
K, K/S Ports P, T, A1, A2: SAE 10;
L, L/S Ports P, T, A1, A2: SAE 12;
T, T/S Ports P, T, A1, A2: 1/4" BSPP;
U, U/S Ports P, T, A1, A2: 3/8" BSPP;
V, V/S Ports P, T, A1, A2: 1/2" BSPP;
W, W/S Ports P, T, A1, A2: 3/4" BSPP;
Technical Features [ + ]

This assembly will automatically discharge an accumulator through a 0.125 inch orifice whenever the pump is shut off. Whenever the pump is started, the pilot-to-close check valve closes, blocking the discharge path back to tank. The standard check valve prevents oil in the accumulator from back-flowing through the pump.

  • The pilot-to-close nominal pilot ratio is 1.8:1. This means that a pressure of 1000 psi (70 bar) at the pilot port will close a valve against a pressure of 1800 psi (125 bar) at port 1. Any decay or loss of pilot pressure could allow the valve to open, even if it is a momentary decay or loss.
Technical Data [ + ]
Body Type Line mountLine mount
Capacity 40 gpm160 L/min.
Mounting Hole Diameter .41 in.10,4 mm
Mounting Hole Depth ThroughThrough
Mounting Hole Quantity 22
FAQs [ + ]

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

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.

Notes [ + ]
  • 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.
Additional Resources [ + ]