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The company attaches importance to product quality and unremittingly carries out R & D, enjoying the reputation of "excellent quality" in the world. Because of this, we insist on providing customers with meticulous service with first-class quality products and good delivery capacity.

Product

Relief Valves (U3D / U3L Series)

The HANGONG Relief Valves (U3D / U3L Series) is designed to protect the system piping. When the upstream pressure exceeds the closing pressure applied by the spring the lower valve stem opens allowing the medium to flow through the valve and the pressure increases as the upstream flow increases. U3D is high pressure Relief Valves its opening pressure from 50psi~6000psi is divided into 8 kinds of springs.
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The HANGONG U3D/U3L series Relief Valves is designed to protect the system piping. When the upstream pressure exceeds the closing pressure applied by the spring the lower valve stem opens allowing the medium to flow through the valve and the pressure increases as the upstream flow increases.
U3D is high pressure Relief Valves its opening pressure from 50psi~6000psi is divided into 8 kinds of springs.
U3L is a low pressure Relief Valves its opening pressure from 10psi~225psi is divided into 7 kinds of springs.
Product features
Ø  The valve can be set at run time. Seven different spring ranges increase the sensitivity of the system and enhance the performance of the product.
Ø  In the spring mode the manual control option provides a complete working pressure range (H3D retraction to 1500psig (103bar) pressure). This option allows the user to reduce upstream pressure while maintaining a predetermined opening pressure. Influence of back pressure minimum sewing function can be fixed pressure specific settings.

Specification size

parameterSpecifications
NameSpecial Relief Valves for high pressure Relief Valves low pressure Relief Valves and pressure reducing valve
Connection formEnd connection internal thread end connection external thread end connection and thread end connection
Rated pressureU3L：400psi（28bar）
U3D：6000psi（413bar）
working temperatureNBR：-34℃~107℃
EPDM：-57℃~135℃
FKM：-23℃~204℃
CR：-43℃~121℃
caliber1/4 in~1/2 in (British)      6mm~12mm (Metric)
body materialSS316 copper chromium plating tantalum alloy titanium alloy niobium alloy zirconium alloy


Spring assembly:
The spring assembly includes springs labels 302SS strips with sealing spring handling and installation instructions.

Select a spring package order and add the spring code to indicate the required pressure range.


HANGONG Needle valve.pdf