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Applications

• Coolant transfer in heater and coolant circuits

• Automobiles, buses, mobile/off-road equipment, trucks

• Other equipment or vehicles with heating lines

Silicone Coolant/Heater Hose

Series 6623 is a hardwall silicone coolant/heater hose designed to transfer high temperature solutions between the radiator and engine on automobiles, buses, mobile/off-road equipment, trucks and any engine incorporating a radiator application. The hose meets or exceeds SAE J20R2 Class A, ISO 1307-1997 and TMC RP303B requirements, with a temperature range of -76° to + 392°F (-60°C to +200°C). The hose construction incorporates multiple plies of textile reinforcement for durability, a helical wire for limited suction capability and collapse/kink resistance, and resists collant suctions, aging, cold leaks, cracking, delamination, ozone and peeling. Series 6620 is manufactured on 130-foot mandrels- providing the longest and most flexible continuous hose lengths in the industry- for tight dimensional tolerances and maximum inventory utilization.

Tube: Black silicone (other colors available; contact Parker)
Reinforcement: Multiple high temperature textile plies with single (to 1-1/4
Cover: Red Silicone, matte finish (other colors available; contact Parker)
Temp Range: -76°F to + 392°F (-60°C to + 200°C)
Brand Method: Black text on yellow stripe
Brand Example: PARKER SILICONE SERIES 6623 -76°F to +392°F (DATE CODE) MADE IN ITALY
Max. Rec. WP 1/3 of minimum burst pressure shown in the table below
Industry Standards: SAE J20R1 Class A; TMC RP303B ; ISO 1307-1997 for dimensional tolerance
Vacuum: 17.7 in/hg
Compare To: Flexfab Blue 5508
Packaging: Coils

 
 
Part Number Size
(in)
ID
(in)
ID
(mm)
OD
(in)
OD
(mm)
Approx Wt
(lbs/ft)
Min Bend Rad
(in)
Min
Burst
Press
(psi)
Perm
Cplg
Rec
Std Pack Qty
(ft)
Stock Status
6623-0375130 3/8 0.394 10.0 0.728 18.5 0.19 2.6 900 * 130 N
6623-0500130 1/2 0.512 13.0 0.846 21.5 0.22 2.8 750 * 130 N
6623-0625130 5/8 0.630 16.0 0.965 24.5 0.26 3.0 600 * 130 N
6623-0750130 3/4 0.748 19.0 1.142 29.0 0.34 3.1 525 * 130 N
6623-0875130 7/8 0.866 22.0 1.260 32.0 0.38 3.5 480 * 130 N
6623-1000130 1 0.984 25.0 1.378 35.0 0.42 3.9 450 * 130 N
6623-1125130 1-1/8 1.102 28.0 1.496 38.0 0.46 4.1 390 * 130 N
6623-1188130 1-3/16 1.181 30.0 1.575 40.0 0.48 4.3 375 * 130 N
6623-1250130 1-1/4 1.260 32.0 1.654 42.0 0.51 4.7 375 * 130 N
6623-1375130 1-3/8 1.378 35.0 1.772 45.0 0.55 5.1 360 * 130 N
6623-1500130 1-1/2 1.496 38.0 1.890 48.0 0.65 5.9 330 * 130 N
6623-1563130 1-9/16 1.575 40.0 1.969 50.0 0.68 7.1 300 * 130 N
6623-1750130 1-3/4 1.772 45.0 2.165 55.0 0.75 8.3 270 * 130 N
6623-2000130 2 2.008 51.0 2.402 61.0 0.83 9.4 255 * 130 N
6623-2250130 2-1/4 2.283 58.0 2.677 68.0 1.03 9.8 225 * 130 N
6623-2375130 2-3/8 2.362 60.0 2.835 72.0 1.34 10.2 210 * 130 N
6623-2500130 2-1/2 2.500 63.5 2.972 75.5 1.41 10.6 210 * 130 N
6623-3000130 3 2.992 76.0 3.465 88.0 1.65 13.8 165 * 130 N
6623-4000130 4 4.016 102.0 4.567 116.0 2.52 15.7 150 * 130 N

Table Notes 
* Couplings:Refer to CrimpSource® at www.safehose.com for coupling recommendations and crimp specifications.

** Stock: "Y" indicates stocked item; "N" indicates non-stocked item. Stock status subject to change. Contact Parker Customer Service.









WARNINGS!
• Couplings attached with bands or clamps may reduce the working pressure of the hose assembly to less than the maximum rated working pressure of the hose. Refer to the NAHAD Industrial Hose Assembly Guidelines.