Counterbalance Valve 30PH-S480-4.5
Product Features
1. Max. setting pressure is at least 1.3 times max. load-induced pressure.
2. Back pressure at port ② should be in the setting range.
3. Reseat pressure exceeds 85% of set pressure.
Product Specifications
| Product Model | Counterbalance Valve 30PH-S480-4.5 |
| Operating Pressure | Loading pressure max. 270 bar when setting pressure at 350bar |
| Flow | See Performance Chart |
| Internal Leakage | Max. 0.4 ml/min.at Reseat; Reseat pressure > 85% of setting pressure; Factory pressure settings established at flow of 32.8 ml/min |
| Pilot Ratio | 4.5:1, max. setting should be equal to 1.3 times the load pressure |
| Temperature | -40 to 120°C |
| Fluids |
Mineral - based or synthetics with lubricating properties at viscosities of 7.4 to 420 cSt (50 to 2000 ssu).Installation: No restrictions |
| Cartridge | Weight: 1.35 kg. (2.97 lbs.); Steel with hardened work surfaces. Zinc-plated exposed surfaces. Seal: O-rings and back-up rings. |
Product Operation Symbol
One-Way Function
The Counterbalance Valve 30PH-S480-4.5 allows the flow from ② to ①, and blocks flow from ① to ② when the pressure of ① is lower than the check spring setting.
Function of Relief Valve: When the pressure in one exceeds the check spring's setting, the cartridge releases the flow from one to the other.
Pilot-Assisted Restriction Function: The restriction function may be achieved by changing the opening degree from ① to ② when there is pilot-assisted pressure at port 3.
Performance/Dimension
WHY CHOOSE US
How we work
Development (tell us your machine model or design)
Quotation (we will provide you with a quotation as soon as possible)
Samples (samples will be sent to you for quality inspection)
Order (placed after confirming quantity and delivery time, etc.)
Design (for your product)
Production (producing goods according to customer requirements)
QC (Our QC team will inspect the products and provide QC reports)
Loading (loading ready-made inventory into customer containers)
Our Certificate
Quality Control
To ensure the quality of factory products,we introduce advanced cleaning and component testing instruments, 100% of the assembled products pass factory testing and the test data of each product is saved on a computer server.
R&D team
Our R&D team consists of 10-20 people, most of whom have about 10 years of work experience.
Our R&D center has a sound R&D process，including customer survey, competitor research, and market development management system.
We have mature R&D equipment including design calculations, host system simulation, hydraulic system simulation, on-site debugging, product testing center, and structural finite element analysis.
