Created on 11/18/2016
c
2016 Sun Hydraulics Corporation See www.sunhydraulics.com for detailed product information 1 of 2
MODEL
SCIA
Direct-acting sequence valve with reverse flow check
SERIES 4 / CAPACITY: 480 L/min. / CAVITY: T-19A
Direct-acting sequence valves with reverse-flow check will supply a secondary circuit with flow once the pressure at
the inlet (port 1) has exceeded the valve setting. Additionally, these valves incorporate an integral check valve to
provide reverse flow from port 2 (sequence) to port 1 (inlet). The pressure setting of a sequence valve controls the
pressure at port 1 relative to the pressure at the drain (port 3).
TECHNICAL DATA
Cavity T-19A
Series 4
Capacity 480 L/min.
Factory Pressure Settings Established at 30 cc/min.
Maximum Operating Pressure 350 bar
Response Time - Typical 2 ms
Maximum Valve Leakage at Reseat 0,7 cc/min.
Check Cracking Pressure 1,7 bar
Adjustment - Number of Clockwise Turns to Increase Setting 5
Valve Hex Size 41,3 mm
Valve Installation Torque 474 - 508 Nm
Adjustment Screw Internal Hex Size 4 mm
Locknut Hex Size 15 mm
Locknut Torque 9 - 10 Nm
Seal kit - Cartridge Buna: 990019007
Seal kit - Cartridge EPDM: 990019014
Seal kit - Cartridge Polyurethane: 990019002
Seal kit - Cartridge Viton: 990019006
Model Weight 1.66 kg.
(L)CONTROL
L Standard Screw Adjustment
C Tamper Resistant - Factory Set
(A)ADJUSTMENT RANGE
A 500 - 3000 psi (35 - 210 bar), 1000 psi
(70 bar) Standard Setting
W 800 - 4500 psi (55 - 315 bar), 1000 psi
(70 bar) Standard Setting
(N)SEAL MATERIAL
N Buna-N
E EPDM
V Viton
MATERIAL/COATING
Standard Material/Coating
/AP Stainless Steel, Passivated
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SCIA
Model Code Example: SCIALANCONFIGURATION OPTIONS
Created on 11/18/2016
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2016 Sun Hydraulics Corporation See www.sunhydraulics.com for detailed product information 2 of 2
(70 bar) Standard Setting
B 300 - 1500 psi (20 - 105 bar), 1000 psi
(70 bar) Standard Setting
C 2000 - 6000 psi (140 - 420 bar), 2000
psi (140 bar) Standard Setting
D 200 - 800 psi (14 - 55 bar), 400 psi (28
bar) Standard Setting
E 100 - 400 psi (7 - 28 bar), 200 psi (14
bar) Standard Setting
TECHNICAL FEATURES
All 3 port sequence cartridges are physically and functionally interchangeable (i.e. same flow path, same cavity for a given frame size).
Although this is a zero pilot flow valve, port 3 (drain) must be connected to maintain a pressure reference in the control chamber. If port 3 is blocked, reciprocating
seal weepage will cause the valve to malfunction.
Pressure at port 3 is directly additive to the valve setting at a 1:1 ratio and should not exceed 5000 psi (350 bar).
Suitable for use in load holding applications.
Cartridges configured with EPDM seals are for use in systems with phosphate ester fluids. Exposure to petroleum based fluids, greases and lubricants will damage
the seals.
Incorporates the Sun floating style construction to minimize the possibility of internal parts binding due to excessive installation torque and/or cavity/cartridge
machining variations.
PERFORMANCE CURVES
