Page 209 - Parker - Quick Coupling Products

Check Valves S6C & 3C Series
Soft Seat

S6C and 3C Soft Seat Check Valves span a wide
variety of sizes and end configurations.

S6C and 3C check valves have a variety of options enabling
them to meet the needs of most systems. The soft seated
poppet creates a leak free seal to protect hydraulic systems
from reverse flow.
S6C check valves are stainless steel with a rated pressure of
6000 psi (sizes 1/4”, 3/8”, 1/2”, 3/4” & 1”). 3C check valves are
steel with a rated pressure of 3000 psi (sizes1-1/4”, 1-1/2” & 2”).
These in-line unidirectional valves are available in sizes 1/4”
to 2”. Standard spring crack pressures are shown in the part
number table. Other crack pressures available upon request.
Features
1. Fluorocarbon poppet seal is standard.
2. Steel or stainless steel construction
3. Optional crack pressures available on request
4. Contact QCD for other materials or configurations

Flow Rate (l/min) Specifications
Hydraulic Oil @ 38°C, Fully Open Size (in) Rated Flow (gpm)
.38 .76 1.36 1.51 1.89 3.79 7.57 11.36 15.14 18.93 37.85 75.70 113.55 378.50
100 6.90 1/4 3
3.45 3/8 8
2.76
30 2.07 1/2 12
20 1.38
3/4 20
Pressure Drop (psi) 5.0 3/8" 1/2" 3/4" 1" .35 Pressure Drop (bar) 1-1/4 125
.69
10
1/4"
30
1
4.0
.28
90
.21
3.0
.14
2.0
1-1/2
1.0
.5 .07 2 175
.034
.4 .028
.3 .021
.2 .014 Seal Options (add code to part number)
.1 Code Poppet Seal Material
.1 .2 .3 .4 .5 1.0 2.0 3.0 4.0 5.0 10 20 30 100 .007
Flow Rate (GPM) suffix A Nitrile E Valves
Hydraulic Oil @ 100°C, Fully Open
suffix E Ethylene Propylene
Flow Rate (l/min)
Hydraulic Oil @ 38°C, Fully Open
37.85 75.70 113.55 151.40 189.25 378.50 757.00 1892.50
500 34.48
400 27.59
300 1-1/4" 20.69
Pressure Drop (psi) 100 1-1/2" 6.90 Pressure Drop (bar)
13.79
200
50
40 3.45
2.76
30 2.07
2"
20 1.38
10 .69
10 20 30 40 50 100 200 500
Flow Rate (GPM)
Hydraulic Oil @ 100°C, Fully Open
E-15 Parker Hannifin Corporation
Quick Coupling Division
Minneapolis, MN
www.parker.com/quickcouplings