What raw materials can Ruitu bromine extraction systems process?

Our bromine extraction systems are designed for seawater, bitter brine, salt lake brine, oilfield water, bromine-bearing industrial wastewater and concentrated brine from desalination plants. The process route is selected only after we review a laboratory analysis of your feed.

Do you supply single machines or complete plants?

Both. We supply individual machines such as salt washers, roller crushers, dryers, vibrating screens, belt conveyors and hot air furnaces, and we also deliver complete turnkey lines under an EPC contract.

What is included in your EPC service?

Water quality testing, site selection support, process design, project launch preparation, equipment manufacturing and procurement, packing and shipping, installation and commissioning, operator training, finished product production guidance, and output buy-back or decommissioning support where agreed.

Can your salt washing equipment produce food-grade salt?

Our salt washing machinery is used for both food-grade and chemical-grade salt. The achievable grade depends on the crude salt composition and the standard that applies in your market, so we design the washing, crushing, drying and screening stages around your target specification.

How do you support overseas installation?

Our engineers can be dispatched to site for installation and commissioning, train your operators, and stay involved until the line produces finished product at the designed daily capacity.

How do I start a project with Ruitu?

Send us your raw material analysis, target daily capacity, product specification and site information by email or phone. Our technicians will prepare a preliminary budget estimate and an economic benefit analysis based on your budget and expected output.

China PTFE-Lined Check Valve Factories, Service

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China PTFE-Lined Check Valve Factories, Service

Brand: Ruitu Automation

Product origin: China

Equipment Type‌: A check valve with PTFE lining on both the valve body and valve core, which opens and closes automatically by fluid pressure.

Purpose‌: Prevents backflow of fluid in pipelines, protecting downstream equipment. It is suitable for scenarios involving the transportation of strongly corrosive media and is often installed at positions such as the outlet of pumps.

Advantages‌: The PTFE lining is resistant to strong corrosion and can withstand corrosion from the medium; the check valve structure can automatically prevent fluid backflow without requiring additional power; it has low flow resistance and has little impact on fluid transportation.

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Product Description

Core Overview

The PTFE-lined check valve is a critical safety device designed to prevent backflow of corrosive media in industrial pipelines. Featuring a robust cast steel or stainless steel body with a complete virgin PTFE (Polytetrafluoroethylene) lining, it ensures complete isolation of metal components from aggressive fluids. Utilizing a swing or lift disc mechanism with PTFE seating, this valve automatically closes when flow reverses, protecting pumps and upstream equipment from damage. It is essential in chemical processing, pharmaceutical manufacturing, and water treatment systems where corrosion resistance and reliable backflow prevention are paramount.

Specifications & Dimensions

Technical Parameters

Parameter	Specification
Body Material	WCB Carbon Steel, CF8/CF8M Stainless Steel
Lining Material	Virgin PTFE (Polytetrafluoroethylene)
Disc/Seat Material	PTFE, Reinforced PTFE
Nominal Diameter (DN)	DN25 – DN400
Pressure Rating	PN1.0, PN1.6, PN2.5 MPa; Class 150/300
Temperature Range	-20°C to +180°C
Type	Swing Check, Lift Check, Dual Plate
Connection Type	Flange (ANSI, DIN, JIS, GB), Wafer
Cracking Pressure	0.035 – 0.1 MPa (Customizable)
Design Standard	API 6D, GB/T 12236

Dimensional Data Table (Wafer Swing Check)

Nominal Size (DN)	Length (L) mm	Height (H) mm	Width (W) mm	Flange Diameter (D) mm	Weight (kg)
DN25	160	95	60	115	2.5
DN32	180	110	70	140	3.5
DN50	230	140	90	165	6.0
DN65	290	160	110	185	9.0
DN80	310	180	130	200	12.0
DN100	350	210	155	220	18.0
DN150	450	280	200	285	32.0
DN200	550	340	250	340	52.0
DN250	650	400	300	395	75.0
DN300	750	460	350	445	105.0
DN350	850	520	400	505	140.0
DN400	950	580	450	565	185.0

Core Advantages

Automatic Backflow Prevention

Self-actuating design automatically closes when flow reverses, protecting pumps and upstream equipment from damage.

Superior Corrosion Resistance

Full PTFE lining withstands aggressive acids, alkalis, and solvents, ensuring long-term reliability in harsh environments.

Low Pressure Drop

Streamlined flow path and optimized disc design minimize resistance, maintaining system efficiency and reducing energy consumption.

Zero Maintenance Operation

No external power or manual intervention required; reliable performance with minimal wear due to PTFE's low friction coefficient.

Compact & Lightweight

Wafer design saves installation space and weight compared to flanged check valves, simplifying pipeline layout and support requirements.

Frequently Asked Questions (FAQ)

What is the primary function of a PTFE-lined check valve?

The valve functions as a self-actuating safety component installed in pipeline systems to automatically prevent the backflow of corrosive fluids, thereby shielding upstream machinery and pumps from reverse pressure surges and media damage.

What chemical media can the PTFE lining withstand?

The pure virgin PTFE (Polytetrafluoroethylene) lining delivers chemical inertness across virtually all harsh media, including concentrated strong acids, alkalis, strong oxidizers, and organic solvents within a working temperature range of -20°C to +180°C.

What body materials and configurations are available?

Standard bodies are manufactured in WCB Carbon Steel or CF8/CF8M Stainless Steel with complete internal lining. Structural mechanisms include Swing Check, Lift Check, and Dual Plate designs across nominal sizes DN25 to DN400.

Which standards and pressure classes are supported?

The valves comply with API 6D and GB/T 12236 design specifications. Available pressure ratings cover PN1.0, PN1.6, and PN2.5 MPa, along with ANSI Class 150/300 flange and wafer mounting dimensions (ANSI, DIN, JIS, GB).

Why choose a wafer-type check valve over traditional flanged models?

The wafer design provides a substantially more compact face-to-face dimension and reduced gross weight, lowering structural load on pipeline racks, saving installation envelope space, and reducing logistics and handling costs.