HE201 Lined Check Valve Wafer Dual Plate
HE201 is a DN10 to DN2600 wafer type lined check valve with dual plate design, built for automatic on-off duty in water, low-pressure chemical, and heating pipelines. It operates by differential pressure across the disc, allowing flow in one direction and closing when flow reverses. The wafer body clamps between two pipe flanges, eliminating the need for separate valve flanges and reducing face-to-face length. The dual plate disc is supported by a spring-loaded mechanism that ensures rapid closure and minimises water hammer during flow reversal.
| Model Code | HE201 |
|---|---|
| Product Type | Lined Check Valve[Wafer Dual Plate] |
| Category | Wafer Type Dual Plate Check Valves |
| Manufacturer | Tianjin MIC Valve Co., Ltd. |
| Size and Pressure Rating | Confirmed on quotation |
| Certification | ISO 9001 and ISO 14001 certified plant |
| Model | HE201 |
| Valve Type | Wafer type lined check valve with dual plate |
| Nominal Diameter | DN10 to DN2600 |
| Connection | Wafer, clamped between pipe flanges |
| Operation | Automatic, based on differential pressure |
| Series | HE201 wafer check valve series |
What This Model Gives You
- Wafer body clamps between existing flanges, reducing installation cost and space compared to flanged valves
- Dual plate disc with spring return closes quickly under reverse flow, reducing water hammer risk
- Lined body resists corrosion from aggressive media such as chemicals and wastewater
- Automatic operation requires no manual intervention or external power
- Short face-to-face length allows tight layouts in pump skids and compact piping systems
- Part of a valve programme certified to ISO 9001 and ISO 14001
Problems It Removes
- Manual valves are too slow and unreliable for automatic backflow prevention in pump systems
- Flanged check valves add length and weight to tight piping layouts where space is limited
- Unlined metal bodies corrode in chemical or wastewater service, leading to early failure
- Lack of automatic closure leads to water hammer and equipment damage during pump shutdown
- Mixed valve types on a project increase spare parts inventory and maintenance complexity
Where It Is Installed
- Prevention of backflow in pump discharge lines where power failure or pump stoppage causes reverse flow
- Protection of water treatment systems from contamination during pressure drops
- Isolation in heating and cooling circuits where flow reversal can damage pumps or heat exchangers
- Use in chemical process lines where corrosion resistance is required and manual valves are impractical
- Installation in sewage treatment plants where automatic check function is needed in low-pressure gravity or pumped lines
Buyers It Suits
- Water and wastewater treatment plant engineers sourcing automatic check valves for pump protection
- HVAC and district heating system designers needing compact backflow prevention
- Chemical plant procurement teams requiring corrosion-resistant check valves for low-pressure lines
- Pump skid builders integrating automatic isolation into compact packages
- EPC contractors standardising on wafer-style check valves across multiple project types
How It Is Built
- Wafer body clamped between two pipe flanges with through bolts
- Dual plate disc with spring return for rapid closure under reverse flow
- Internal lining provides corrosion resistance for aggressive media
- Automatic operation based on differential pressure across the disc
- Designed for low- and medium-pressure service with nominal pressure up to 4.0 MPa
- Part of a HE201 wafer check valve series covering DN10 to DN2600
Material Selection
- Body, disc, and lining materials are confirmed per order against the buyer's medium and temperature
- Lining material options follow the variants offered across the HE201 series
- Material certificates are issued with the order when the buyer requests them
How It Is Made
- Body casting inspected and machined on in-house fine machining equipment
- Disc and spring assembly fitted and tested for smooth travel and return
- Lining applied and cured to ensure full coverage and adhesion
- Assembled valve tested for leakage and closure speed under reverse flow
- Marked, wrapped and crated for container shipment from Tianjin
How It Is Checked
- Dimensional check of body face-to-face length and flange bolt pattern before assembly
- Lining integrity tested with pressure and visual inspection
- Closure speed and sealing performance verified on every unit
- Testing carried out on the 10 sets of imported inspection and testing equipment
- Records kept under the ISO 9001 quality management system
Certificates Issued With This Valve
- ISO 9001 quality management system certification
- ISO 14001 environmental management system certification
Certification statements are limited to the management system certificates the factory actually holds. Product-level approvals for your market are confirmed before order.
What Can Be Changed
- Lining material selected for the medium and temperature on the buyer's line
- Flange drilling matched to the standard used on the buyer's pipework
- Private label marking and packing on OEM orders
- Mixed-diameter orders combined with other valves in one container
- Optional actuator or manual override added if required for special service
How It Compares With the Alternatives
| Flanged check valve | The flanged valve is heavier and longer but allows end-of-line service; the wafer body requires flanges on both sides |
|---|---|
| Swing check valve | The swing valve has a single disc and slower closure; the dual plate design closes faster and reduces water hammer |
| Lug type check valve | The lug body allows end-of-line use and is easier to install in dead-end lines; the wafer body cannot |
| Ball check valve | The ball check valve has a smaller bore and higher pressure drop; the dual plate design maintains better flow area |
Installing and Operating This Valve
- Confirm the flange standard and bolt pattern on both pipe flanges before ordering
- Install the valve with the flow arrow aligned with the direction of intended flow
- Ensure the disc is free to move and the spring is not compressed during installation
- Do not use the wafer body as a pipe end closure during pressure testing
- Avoid installing in horizontal runs where debris may settle and block disc movement
- Test the closure function after installation by reversing flow briefly to confirm operation
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Sectioning valves non-return protection and joints for distribution mains pumping stations and treatment works.
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Isolation and non-return duty on transfer lines tank farms and utility circuits.
Dual Plate Check Valve Selection Guide
How to size and select a wafer dual plate check valve so it closes before the flow reverses.
HE201 Lined Check Valve Wafer Dual Plate FAQ
What size and pressure rating is HE201?
It is available from DN10 to DN2600 with nominal pressure up to 4.0 MPa. The exact pressure rating and flange standard are confirmed on request based on your line data.
Can this valve be used at the end of a pipe run?
No. A wafer body requires pipe flanges on both sides to clamp against. For end-of-line service, ask for the lug type body instead.
Which lining material is used?
Lining material is selected based on the medium and temperature on your line. We confirm the combination during the quotation and issue material certificates on request.
Is the valve suitable for high-velocity flow reversal?
Yes. The dual plate disc with spring return ensures rapid closure under reverse flow, reducing water hammer risk in high-velocity applications.
Can it be supplied with a manual override?
Yes. Manual override or actuator options are available on request and can be fitted before shipment.
What certification does the factory hold?
Tianjin MIC Valve Co., Ltd. is certified to the ISO 9001 quality management system and the ISO 14001 environmental management system.
How do I get a quotation?
Send the model, quantity, flange standard, medium, and temperature by WhatsApp or email and our sales engineers reply with a quotation and confirmed specification sheet.
Get a Price for HE201 Lined Check Valve Wafer Dual Plate
Tell us the quantity, flange standard and the medium on your line. You get a quotation with a confirmed specification sheet, not a catalogue page.