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Home / Products / Check Valves / Foot Valves / Stainless Steel LH45X Pilot Operated Flow‑Limiting Check Valve Hydraulic Control Valve Slow Close Anti‑Water‑Hammer Valve For Water Pump Outlet

Stainless Steel LH45X Pilot Operated Flow‑Limiting Check Valve Hydraulic Control Valve Slow Close Anti‑Water‑Hammer Valve For Water Pump Outlet

LH45X flow‑limiting check valve is a typical pilot‑diaphragm type hydraulic control valve, which is mainly installed at the outlet of water pump unit. The valve collects pressure signal both from upstream and downstream pipeline through double sampling pressure tubes
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Product Description

限流止回阀LH45X-16P (5).jpg
限流止回阀LH45X-16P (4).jpg

Main Part Material

Part Name

Part Materical

Body/Bonnet

WCB

WC6

LCB

CF8

Disc

25

1Cr18Ni9Ti

1Cr18Ni9Ti

1Cr18Ni9Ti

Swing Arm

WCB

25Cr2MoV

LCB

CF8

Graphite Gasket

18-8Flexible Graphite

Bolt

35/35CrMo

25Cr2MoV

1Cr18Ni9Ti

1Cr18Ni9

Suitable Temp

-29-425℃

-29-550℃

-46-350℃

-46-200℃

Suitable Medium


Water,Oil,Steam


Steam,Oil


Propane,Ethene


Nitric Acid

Item

Specification

Product Name

LH45X Flow‑Limiting Check Valve

Valve Body Material

Stainless Steel

Connection Type

Flange End

Driving Mode

Pilot Hydraulic Diaphragm Operation

Working Medium

Clean water, circulating water, general non‑corrosive water

Installation Position

Pump outlet, horizontal pipeline

Core Function

Flow limiting + slow close check + anti water hammer

Auxiliary Parts

Double needle regulating valves, pilot control valve, pressure sampling tubes

Power Requirement

No external power supply, driven by medium pressure

Main Features

  • Full stainless‑steel valve body, strong corrosion resistance, adapt to various water medium

  • Pilot hydraulic driving structure, works without external power supply

  • Dual‑side pressure sampling design, accurately sense pressure difference between upstream and downstream

  • Effectively limit maximum flow, avoid pump motor overload burn‑out

  • Slow‑closing non‑return function, greatly weaken water‑hammer impact caused by pump shutdown

  • Two needle hand‑wheel valves equipped, simple and safe for on‑site commission and maintenance

  • Diaphragm drive, stable opening & closing action, long service life

  • Flange connection, convenient pipeline installation and disassembly

Application

  • Pump outlet of multi‑pump parallel water‑supply station

  • Municipal water supply network projects

  • High‑rise building water‑supply system

  • Industrial circulating water pipeline

  • Water plant and sewage treatment supporting pipelines

  • Central air‑conditioning water circulation system

Precision Valve Manufacturing

Professional Valve Manufacturer | Integrated Manufacturing

Raw Material

We select high-quality raw materials according to product specifications and international standards. All incoming materials are carefully inspected to ensure chemical composition, mechanical properties and traceability.

Forging & Casting

Advanced forging and casting processes are used to produce strong and reliable valve bodies and components. Strict process control ensures uniform structure, dimensional accuracy and excellent mechanical performance.

CNC Machining

Our CNC machining equipment provides precise and consistent processing of valve components. Critical dimensions, threads and sealing surfaces are strictly controlled to ensure accurate assembly and reliable sealing performance.

Shot Blasting & Coating

Valve surfaces are professionally shot blasted to remove rust, scale and impurities. Protective coatings are then applied according to customer requirements, providing excellent corrosion resistance and a durable surface finish.

Pressure Testing

Every valve undergoes strict pressure testing before shipment. Body and seat tests are performed according to applicable standards and customer specifications to verify pressure resistance and sealing reliability.

Quality Inspection

Our quality control team conducts comprehensive inspections throughout the production process. Finished valves are checked for dimensions, appearance, materials, pressure performance and overall quality before final approval and shipment.

For more products, please contact us

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Email: Eileenye@huhang.cn / tina@huhang.cn
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