Shijiazhuang Laiye Import& Export Trading Co., Ltd. is one of the leading manufacturers and suppliers of p40 series hydraulic manual control valve in China, also supports customized service. If you're going to wholesale high quality p40 series hydraulic manual control valve made in China, welcome to get pricelist from our factory.
Custom properties
The P40 series hydraulic manual control valve flows 40 L/min - the smallest in the P series.
This is the entry-level valve. Not the biggest. Not the most powerful. Just the right size for equipment that doesn't need high flow. Compact loaders, small forklifts, light agricultural equipment - machines with smaller cylinders and lighter loads.
Monoblock construction. One piece of cast high-strength alloy steel. Simpler than sectional, fewer leak points, lower cost. Fixed sections - 1 to 7.
Manual lever control. Pull a lever, spool shifts, oil flows. No electronics, no wiring, no pilot lines. Just mechanical control.
What 40 L/min means in practice
40 L/min is the smallest flow in the P series. That doesn't mean it's insufficient - it means it's matched to smaller equipment.
A compact loader moving light materials doesn't need 80 L/min. A small forklift lifting moderate loads doesn't need 120 L/min. 40 L/min is enough for these machines. Anything more is wasted capacity - you pay for flow you don't use.
If your equipment runs on 40 L/min and works fine, the P40 is the right choice. If it feels sluggish, you may need the P80.
If you're not sure, tell us your cylinder sizes and cycle times. We'll calculate your actual flow requirement.
Production description
P40 MONOBLOCK
DIRECTIONAL CONTROL VALVE
PARAMETERS
|
AMBIENT TEMPERATURE RANGE |
-40℃ to+80℃(-40°F to+176°F) |
|
OPERATING VISCOSITY RANGE |
15-75mm²/s(15 cSt to 75cSt) |
|
MAX PRESSURE |
250 bar(3600 psi) |
|
RATED FLOW |
40 L/min(10.5 US gpm) |
|
STRUCTURE TYPE |
Monoblock valve |
|
SECTION |
1 Section,2 Section,3 Section,4 Section,5 Section,6 Section,7 Section |
HYDRAULIC SCHEMATIC
P40,P80,P120 series are economical monoblock directional control valves with various applications and features of compact structure,stable performance, low price and high universality.
Control type:manual,cable,solenoid,pneumatic,electro-hydraulic,etc.
Circuit type:parallel
Monobock structure,1-7 sections
Ordering code
P XX - X - X - X - X X X - X X X ... - x - x
② ③ ④ ⑤ ⑥ ⑦ ⑤ ⑥ ⑦ ⑧ ⑨
① Flow:40,80,120
② Number of sections:1-7
③ Relief valve set pressure:100-250 bar
④ inlet port size:see table(1)
⑤ Control type:see table(2)
⑥ Spool type:see table(3)
⑦ Spool returning type:see table(4)
⑧ Work port size:see table(1)
⑨ Outlet port size:see table(1)
Table(1)
|
BSPthread |
Metric thread |
US standard UNF thread |
US standard NPT thread |
||||
|
Code |
Thread size |
Code |
Thread size |
Code |
Thread size |
Code |
Thread size |
|
G04 |
G1/4 |
M16 |
M16X1.5 |
U10 |
5/8-12UNF |
NO6 |
NPT3/8 |
|
G06 |
G3/8 |
M18 |
M18X1.5 |
U12 |
3/4-16UNF |
N08 |
NPT1/2 |
|
G08 |
G1/2 |
M20 |
M20X1.5 |
U14 |
7/8-14UNF |
N12 |
NPT3/4 |
|
G12 |
G3/4 |
M22 |
M22X1.5 |
U16 |
1-12UNF |
||
|
G16 |
G1 |
M27 |
M27X2 |
U22 |
11/8-12UNF |
N16 |
NPT1 |
Product process and installation
P120 Series Hydraulic Cartridge Valves combine precision manufacturing with straightforward installation to deliver reliable performance in demanding applications. Their construction begins with high-grade alloy steel, subjected to computer-controlled machining. This process ensures precise tolerances and consistent geometry for critical sealing surfaces.
Internal components, such as spools, sleeves, and springs, undergo dedicated finishing processes. These steps enhance durability and minimize friction during operation. Following machining, a protective surface treatment-typically phosphate or nitride coating-is applied. This final layer provides excellent corrosion resistance and improves wear characteristics.
Installation centers on a custom-designed manifold or valve block. A clean, correctly sized cavity must be machined into this block according to the valve's specific cartridge profile. During assembly, it is vital to ensure both the cavity and the valve body are free of contaminants. The valve inserts directly into this prepared cavity and is secured with a threaded cover plate, retention plate, or a simple threaded body, depending on the style.
A key installation requirement is achieving the correct squeeze on the elastomeric seals, which are typically located in grooves on the valve's outer diameter. This is managed by controlling the depth of the cavity and the torque on the retaining fastener. Proper installation creates a leak-free, pressure-tight connection while avoiding seal damage from over-compression. For optimal results, always adhere to the manufacturer's specified cavity dimensions, installation torque values, and recommended system cleanliness standards.
Where it belongs
The P40 series hydraulic manual control valve is for light equipment that needs 40 L/min:
Compact loaders - light materials, moderate duty
Small forklifts - lower lift capacities
Light agricultural equipment - smaller implements
Small excavators - compact machines
Material handling equipment - light loads
Small power units - auxiliary circuits
About the company
Shijiazhuang Laiye Import & Export Trading Co., Ltd., part of Hebei Onederful® Hydraulic Technology Co., Ltd., has been making hydraulic components since 1988 - over 35 years.
We're a factory, not a trading company. Around 200 employees. Full in-house production: casting, machining, assembly, testing, phosphating.
Products go to Russia, Europe, the Middle East, South America, and Asia. ISO 9001 certified. Every valve is tested individually, with data linked to its serial number.
Packaging and transportation
Factory workshop
Company exhibition
FAQ
Q: How can the severe shock during the P40 valve's directional switching be resolved?
A: Severe switching shock is usually caused by an excessively high switching speed or moving the control handle too quickly. If the system permits, throttle valves can be installed at the P-port or A/B-ports of the directional control valve to slow down the switching speed. Additionally, check the system for trapped air; bleeding the air will also help reduce the shock.
Q: What causes sluggish starting of the P40 in cold winter temperatures?
A: At low temperatures, hydraulic fluid viscosity increases and resistance to spool movement rises, which can lead to sluggish operation or sticking during startup. It is recommended to use low-temperature hydraulic fluid or to run the system at low pressure without a load for a few minutes during a cold start, applying the load only after the oil temperature has risen.
Q: Do the P40 and other models in the P series share the same mounting dimensions?
A: The P40 and P80 have different mounting dimensions and are not directly interchangeable. Due to differing flow ratings, the valve body sizes and port specifications also vary. If you need to replace or upgrade a unit, it is recommended to verify the mounting dimensions and port specifications.
Q: Can you send a sample of the P40 for testing first?
A: Yes. Please contact our sales team to explain the intended use and equipment operating conditions; they will inform you of the policies regarding sample costs and shipping fees.
Q: How is the P40 packaged?
A: Small quantities are packed in cartons, while large quantities are packed in export-grade plywood crates. Valve ports are sealed with dust plugs to prevent the entry of impurities during transport.
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