Parker Hannifin Corporation
Quick Coupling Division
Minneapolis, MN 55427
14
Quick Coupling Products
High Flow Couplings
ST Series
Applications
The Parker ST Series are non-valved couplings for
applications where maximum flow is required. Their smooth,
open bore offers the lowest pressure drop of any quick
coupling design and is ideal for applications such as high-
pressure water and steam washers, carpet cleaners and
mold coolant lines. They are often used in food processing, on
fluid and dye transfer lines.
Specifications
Body Size
1/8 1/4 3/8 1/2 3/4 1 1-1/4 1-1/2
Rated Pressure (PSI)
Brass
2500 5200 2700 2200 1700 1200 1700 1400
Stainless Steel
4200 6700 5500 3000 3000 1700 – –
Rated Flow
3 6 12 12 28 50 76 100
Temperature Range (std seals)
-40
° to +250°F
Performance
ST Series (3/4", 1", 1-1/4")
Test Fluid: Oil - 150 SUS
0
1
2
3
4
5
0
20
40
60
80
100
Flow in USGPM
Pressure Drop in PSID
3/4"
1"
1-1/4"
ST Series (1/8", 1/4", 3/8", 1/2")
Test Fluid: Oil - 150 SUS
0
2
4
6
8
10
12
0
2
4
6
8
10
12
14
16
18
Flow in USGPM
Pressure Drop in PSID
1/8"
1/4"
3/8"
1/2"
Special Order Information
All sizes of ST Series can be furnished with locking sleeves.
Place suffix letters “SL” (Sleeve-Lok) after regular catalog
numbers. Example: SST-4MSL. Standard seal material is
Nitrile. Ethylene Propylene, Fluorocarbon, or Neoprene seals
are available upon request. See Fluid Compatibility Chart for
recommendations.