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1SE90 Series Counterbalance Cartridge Valves, Up To 5000 PSI & 23 GPM

Description & Features

Application	To control moving loads and prevent load runaway, giving load holding and hose failure safety. See Introduction to Counterbalance (Overcenter) Valves at the beginning of this section.
Features	The 1SE90 is a 3 port, externally piloted, screw-in cartridge-type counterbalance (overcenter) valve. Requires a machined T2A Sun cavity or housing for installation.
Installation	44 ft-lbs torque cartridge into cavity. Unrestricted mounting position.
Pilot Ratios	4:1 - Best suited for applications where the load remains relatively constant.
Recommended Filtration	ISO level 18/13 or better.
Specifications	23 gpm rated flow. 4000 psi max load induced pressure, 5000 psi max relief pressure. CAUTION: Pressures over 3000 psi require a steel housing. -22° to +194°F operating temperature range. 5 drops per minute max internal leakage. Based on oil temperature of 104°F and 150 SSU.

Products

Model Number	Part Number	Pilot Ratio	Adjustment Style	Pressure Range (psi)	Pressure Setting	Housing	Seal Material	Price	Action
1SE90F35S4 1SE90 Series Cartridge Valve	406AA00054A	4:1	Screw with Locknut	2537-5075	3045	None	Nitrile

Product Questions & Answers (1)

Question by: Peggy W on Nov 6, 2025, 6:25 AM

Reckon this'd be good for keepin' a load steady on my crane? Don't want no runaway if a hose blows.

Answer by: Customer Support on Nov 7, 2025, 11:14 AM

That's precisely what this counterbalance valve is designed for. It provides load holding and hose failure protection, especially important for equipment like cranes where you're controlling moving loads.