How big is a drop of hydraulic oil?

There are exactly 250 Sun drops in a cubic inch or 15 in a cc.

Should I replace the counterbalance valve if my cylinder is drifting or moving?

While cylinder drifting is often attributed to a leaking or damaged counterbalance valve, it can also be caused by cylinder seal leakage or changes in oil temperature. If you believe the seat of the counterbalance valve has been damaged, which can be caused by shock or contamination, it is advisable to replace the valve with a new factory set valve. Always follow the manufacturer's recommendations for servicing of hydraulically actuated machinery, and insure all loads are mechanically supported and cartridges are not under pressure when removed.

Why can't I block the pilot vent port? That area is positively sealed, isn't it?

Yes it is sealed; however every time the valve is cycled a small amount of oil passes into the spring chamber--about 1 drop for every 4000 cycles. If the vent is blocked, the spring chamber will eventually fill with oil, building pressure until the valve won't open.

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Hydraulic Counterbalance Valve Comparable Replacement to Sun Hydraulics CBCA-LHN, 3:1 pilot ratio, standard capacity

Product ID: 403960857

Details

Material
Stainless
Brand
VIWITECH
Exterior finish
Nickel
Inlet connection type
Barb
Outlet connection type
Barb

📈3:1 pilot ratio precision

🔩4000 PSI max pressure durability

⚙️15 GPM standard capacity

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5332506₫

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Sold byAmazon VietnamDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚙️ Master your hydraulics with precision and power!

DURABLE BUILD - Nickel-plated stainless steel construction resists corrosion and wear
EASY INTEGRATION - Standard T-11A cavity compatibility for quick replacement and minimal downtime
PRECISION PILOT RATIO - 3:1 ratio ensures accurate pressure balancing under varying loads
RELIABLE FLOW CONTROL - Handles up to 15 gallons per minute for smooth hydraulic performance
ROBUST PRESSURE RANGE - Operates seamlessly between 1000-4000 PSI for versatile industrial use

The VIWITECH Hydraulic Counterbalance Valve CBCA-LHN is a high-performance, standard capacity valve designed for reliable pressure control up to 4000 PSI. Featuring a precise 3:1 pilot ratio and durable nickel-plated stainless steel construction, it fits standard T-11A cavities and supports flow rates up to 15 GPM, making it an ideal replacement for Sun Hydraulics CBCA-LHN models.

Specifications

Manufacturer	VIWITECH
Part number	CBCA-LHN
Item Weight	159 g
Package Dimensions	10.31 x 4.19 x 4.19 cm; 159 g
Item model number	CBCA-LHN
Material	Stainless Steel, nickel plated
Maximum Pressure	4000 Pound per Square Inch
Batteries Included?	No
Batteries Required?	No

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