EATON Piloted check valve 4CK301S/A6610 

401AA00001A Screw-in Cartridge Valves - 4CK301S PILOT CHECK 30 LPM, 3:1

Rated Flow 30 litres/min (8 US GPM)

Max Pressure 350 bar (5000 psi)

Pilot Ratio 3:1

Cartridge Material Working parts hardened and ground steel. Electroless zinc plated body

Body Material Standard aluminium (up to 210 bar*) Add suffix ‘377’ for steel option.

Mounting Position Unrestricted

Cavity Number A6610 (See Section 17)

Torque Cavity into Cartridge

45 Nm (33 lbs ft)

Weight 4CK30 0.08 kg (0.18 lbs)

4CK35 0.34 kg (0.75 lbs)

4CKK35 0.76 kg (1.67 lbs)

Seal Kit Number SK430 (Nitrile) SK430V (Viton)

Recommended Filtration Level BS5540/4 Class 18/13 (25 micron nominal)

Operating Temp -20°C to +90°C

Leakage 0.3 millilitres/min nominal

Nominal Viscosity Range

5 to 500 cSt

Feature Code Description

SERIES 4CK30 30 L/MIN [8 USGPM];350 BAR [5000 PSI] PILOT TO OPEN CHECK VALVE - CARTRIDGE ONLY

PILOT PORT SIZE -1 INTERNAL

PORT SIZE _ NONE

SEAL -S NITRILE (FOR USE WITH MOST INDUSTRIAL HYDRAULIC OILS)

PILOT PISTON SEAL _ (_) NO PILOT SEAL

BODY MATERIAL _ ALUMINUM

SPECIAL FEATURES _ NONE