Products

Suppliers
Filter Gallery
2,271

Non Return Flap Valve

Products

Sorry! No matches were found.

ANSI Flanged Bronze Check Valves Non Return Valves Wafer Double Flap Type

ANSI Flanged Bronze Check Valves Non Return Valves Wafer Double Flap Type

US $ 10-100 / Piece FOB
1 Piece (MOQ)
More
Main Products: Butterfly Valve, Full PTFE/PFA Lined Butterfly Valve, Double Flange Flanged Butterfly Valve, Wafer Type Lug Lugged Type Butterfly Valve, Check Valve, Resilient Rubber Seated Flanged Gate Valve OEM/OD
Contact Supplier
Audited Supplier
Tianjin Worlds Valve Co., Ltd.

Manufacturer/Factory & Trading Company

Tianjin, China Since 2010
Chat Now Send Inquiry
Sanitary Stainless Steel Non-Return Flap Valve Check Valve Back-Pressure Valve

Sanitary Stainless Steel Non-Return Flap Valve Check Valve Back-Pressure Valve

US $ 15-30 / Piece FOB
1 Piece (MOQ)
More
Sealing Form : Bellows Globe Valve
Contact Supplier
Audited Supplier
Wenzhou Forever Classic Technology Co., Ltd.

Zhejiang, China Since 2008
Chat Now Send Inquiry
Stainless Steel Dual Disc Spring Wafer Type Check Valve with Non-Return Flap Water Prevention

Stainless Steel Dual Disc Spring Wafer Type Check Valve with Non-Return Flap Water Prevention

US $ 10-5,500 / Piece FOB
1 Piece (MOQ)
More
Main Products: Electric Actuator, Pneumatic Actuator, Industrial Valves, Butterfly Valves, Gate Valves, Knife Gate Valves, Globe Valves, Check Valves
Contact Supplier
Dexiang Electromechanical Equipment Co., Ltd

Guangxi, China Since 2025
Chat Now Send Inquiry
Low Price FRP Non Return Valve Check Valve Flap Gate Price

Low Price FRP Non Return Valve Check Valve Flap Gate Price

US $ 95-100 / Set FOB
50 Sets (MOQ)
More
Media : Water
Contact Supplier
Audited Supplier
Hebei Derunze Chemical Equipment Co., Ltd

Manufacturer/Factory & Trading Company

Hebei, China Since 2021
Chat Now Send Inquiry
DIN F6 DN100 EPDM Rubber Flap Check Valve Non Return Check Valve Flanged Btval

DIN F6 DN100 EPDM Rubber Flap Check Valve Non Return Check Valve Flanged Btval

US $ 38.85-42.85 / Piece FOB
1 Piece (MOQ)
More
Main Products: Valve
Contact Supplier
Audited Supplier
Botou Valve Manufacturing Industry Co., Ltd.

Manufacturer/Factory & Trading Company

Hebei, China Since 2020
Chat Now Send Inquiry
Plastic UPVC/PVC/CPVC Wafer Type Single Plate Non Return Flap Check Valve

Plastic UPVC/PVC/CPVC Wafer Type Single Plate Non Return Flap Check Valve

US $ 100-2,000 / Set FOB
100 Sets (MOQ)
More
Structure : Swing
Contact Supplier
Audited Supplier
ZHENGZHOU FREE FLUID CONTROL TECHNOLOGY CO., LTD

Henan, China Since 2024
Chat Now Send Inquiry
DN40~DN700 Pn10 Pn16 Ductile Cast Iron Double Disc One-Way Dual Non Return Wafer Type Flap Check Valve

DN40~DN700 Pn10 Pn16 Ductile Cast Iron Double Disc One-Way Dual Non Return Wafer Type Flap Check Valve

US $ 18-1,500 / Piece FOB
1 Piece (MOQ)
More
Main Products: Ball Valve, Gate Valve, Globe Valve, Check Valve, Butterfly Valve, Strainers (Filters), Industrial Valve, Valve, DIN Valve, Non Return Valve
Contact Supplier
Audited Supplier
Linyi Bonny Valve Co., Ltd

Shandong, China Since 2022
Chat Now Send Inquiry
Pn10 Pn16 Ductile Cast Iron Double Disc One-Way Dual Non Return Wafer Type Flap Check Valve

Pn10 Pn16 Ductile Cast Iron Double Disc One-Way Dual Non Return Wafer Type Flap Check Valve

US $ 9-999 / Piece FOB
2 Pieces (MOQ)
More
Structure : Butterfly
Contact Supplier
Audited Supplier
SINCO FIRE AND SECURITY CO., LIMITED

Fujian, China Since 2017
Chat Now Send Inquiry
High Quality 1.0MPa PVC Wafer Swing Horizontal Check Valve UPVC Non Return Flap Check Valve Plastic Disc Vertical Check Valve DIN ANSI JIS BS Standard

High Quality 1.0MPa PVC Wafer Swing Horizontal Check Valve UPVC Non Return Flap Check Valve Plastic Disc Vertical Check Valve DIN ANSI JIS BS Standard

US $ 1.29 / Piece FOB
1 Piece (MOQ)
More
Main Products: PVC Ball Valve, PVC Foot Valve, PVC Check Valve, PVC Butterfly Valve, CPVC Butterfly Valve, FRPP Butterfly Valve, Plastic Valve, PVC Flange, PVC Union, PPR Butterfly Valve
Contact Supplier
Audited Supplier
Tianjin Runke Plastic Tech Co., Ltd.

Manufacturer/Factory & Trading Company

Tianjin, China Since 2010
Chat Now Send Inquiry
Swing Check Valve/Single Door Valve/Non Return Flap Valve for Petrochemical Industry

Swing Check Valve/Single Door Valve/Non Return Flap Valve for Petrochemical Industry

US $ 5-58 / Set FOB
1 Set (MOQ)
More
Material of Seal Surface : Metal Hard Sealed
Contact Supplier
Audited Supplier
ABC VALVE WUXI CO., LTD.

Manufacturer/Factory & Trading Company

Jiangsu, China Since 2024
Chat Now Send Inquiry
DN40~DN700 Pn10 Pn16 Ductile Cast Iron Double Disc One-Way Dual Non Return Wafer Type Flap Check Valve

DN40~DN700 Pn10 Pn16 Ductile Cast Iron Double Disc One-Way Dual Non Return Wafer Type Flap Check Valve

US $ 12.98-200 / Piece FOB
2 Pieces (MOQ)
More
Main Products: Valves
Contact Supplier
Audited Supplier
Tianjin KXC Metal Products Co., Ltd

Manufacturer/Factory & Trading Company

Tianjin, China Since 2021
Chat Now Send Inquiry
Plastic Anti-Odor Check Valve Toilet Non-Return Flap Damper Back Pressure Air Valve for Ventilation System for Kitchen Bathroom

Plastic Anti-Odor Check Valve Toilet Non-Return Flap Damper Back Pressure Air Valve for Ventilation System for Kitchen Bathroom

US $ 0.19-0.22 / Piece FOB
500 Pieces (MOQ)
More
Material : ABS
Contact Supplier
Audited Supplier
Zhejiang Tianpu Rubber & Plastic Co., Ltd.

Manufacturer/Factory & Trading Company

Zhejiang, China Since 2023
Chat Now Send Inquiry
Related Searches
Check Valve Butterfly Valve Gate Valve Ball Valve Other Valves & Parts Control Valve
Swing Check Valve Lift Check Valve Wafer Check Valve Ball Check Valve Dual Plate Check Valve Tilting Disc Check Valve
Cast Ductile Iron Flanged Dual Plate Automatic Non Return Check Valve (Flap Swing Ball Type)

Cast Ductile Iron Flanged Dual Plate Automatic Non Return Check Valve (Flap Swing Ball Type)

US $ 2-2,000 / Piece FOB
1 Piece (MOQ)
More
Main Products: Valve, Ball Valve, Gate Valve, Check Valve, Globe Valve, Butterfly Valve, Control Valve, Stainless Steel Ball Valve, Stainless Steel Butterfly Valve, Stop Valve
Contact Supplier
Audited Supplier
YOONAD VALVE (WUXI) CO., LTD.

Jiangsu, China Since 2024
Chat Now Send Inquiry
H74W Single Plate Flap Stainless Steel Non Return Check Valve

H74W Single Plate Flap Stainless Steel Non Return Check Valve

US $ 10-200 / Piece FOB
1 Piece (MOQ)
More
Standard : GB
Contact Supplier
Audited Supplier
Tianjin Tanggu General Valve Group Co., Ltd.

Manufacturer/Factory & Trading Company

Tianjin, China Since 2025
Chat Now Send Inquiry
Rubber Flap Flange End Non Return Valve

Rubber Flap Flange End Non Return Valve

US $ 19.41-126.19 / Piece FOB
50 Pieces (MOQ)
More
Main Products: Copper valves, Cast iron valves, Drain valves, Groove pipe fittings & Fire protection valves, HAVC Valves, Stainless steel soft seal, SUS & industrial & specialized valves.
Contact Supplier
Audited Supplier
Huhang Technology Group Co., Ltd.

Manufacturer/Factory & Trading Company

Fujian, China Since 2024
Chat Now Send Inquiry
Large Diameter Ductile Cast Iron Flanged Non Return Flap Valve Price

Large Diameter Ductile Cast Iron Flanged Non Return Flap Valve Price

US $ 650-700 / Ton FOB
100 Tons (MOQ)
More
Application : Industrial Usage, Water Industrial Usage
Contact Supplier
Audited Supplier
TIANYI SUNS PIPE & FITTINGS CO., LTD.

Shanxi, China Since 2011
Chat Now Send Inquiry
Stainless Steel CF8m Non Return Valve Flap Check Valve

Stainless Steel CF8m Non Return Valve Flap Check Valve

US $ 15-321 / Set FOB
2 Sets (MOQ)
More
Main Products: Valve, Fire Hydrant, Flange, Pipe Fitting, Strainer, Rubber Joint, Mud Box
Contact Supplier
Audited Supplier
QINGDAO I-FLOW CO., LTD.

Trading Company

Shandong, China Since 2020
Chat Now Send Inquiry
Shf Water Flap Non Return Natural Gas Check Valve

Shf Water Flap Non Return Natural Gas Check Valve

US $ 40 / Piece FOB
1 Piece (MOQ)
More
Application : Industrial Usage, Water Industrial Usage, Household Usage
Contact Supplier
Audited Supplier
Suzhou Shangheng Valve Co., Ltd.

Jiangsu, China Since 2025
Chat Now Send Inquiry
High Quality PVC Single Disc Check Valve UPVC Wafer Swing Type Check Valve Plastic Flap Non Return Check Valve DIN ANSI JIS BS Standard DN20-DN400

High Quality PVC Single Disc Check Valve UPVC Wafer Swing Type Check Valve Plastic Flap Non Return Check Valve DIN ANSI JIS BS Standard DN20-DN400

US $ 10.78 / Piece FOB
1 Piece (MOQ)
More
Main Products: PVC Ball Valve, PVC Foot Valve, PVC Check Valve, PVC Butterfly Valve, CPVC Butterfly Valve, FRPP Butterfly Valve, Plastic Valve, PVC Flange, PVC Union, PPR Butterfly Valve
Contact Supplier
Audited Supplier
Tianjin Runke Plastic Tech Co., Ltd.

Manufacturer/Factory & Trading Company

Tianjin, China Since 2010
Chat Now Send Inquiry
4 Inch Flap Check Valve Price Ductile Iron Stainless Steel One Way Non Return Valve Dual Plate Wafer Check Valve

4 Inch Flap Check Valve Price Ductile Iron Stainless Steel One Way Non Return Valve Dual Plate Wafer Check Valve

US $ 2.8-200 / Piece FOB
1 Piece (MOQ)
More
Material : Cast Iron
Contact Supplier
Audited Supplier
Tianjin Tanggu General Valve Group Co., Ltd.

Manufacturer/Factory & Trading Company

Tianjin, China Since 2025
Chat Now Send Inquiry
Related Videos
  • What is ANSI Flanged Bronze Check Valves Non Return Valves Wafer Double Flap Type
    What is ANSI Flanged Bronze Check Valves Non Return Valves Wafer Double Flap Type
    US $ 10-100 /Piece
    1 Piece (MOQ)
    Contact Supplier
  • What is Low Price FRP Non Return Valve Check Valve Flap Gate Price
    What is Low Price FRP Non Return Valve Check Valve Flap Gate Price
    US $ 95-100 /Set
    50 Sets (MOQ)
    Contact Supplier
  • What is DIN F6 DN100 EPDM Rubber Flap Check Valve Non Return Check Valve Flanged Btval
    What is DIN F6 DN100 EPDM Rubber Flap Check Valve Non Return Check Valve Flanged Btval
    US $ 38.85-42.85 /Piece
    1 Piece (MOQ)
    Contact Supplier
  • What is Plastic UPVC/PVC/CPVC Wafer Type Single Plate Non Return Flap Check Valve
    What is Plastic UPVC/PVC/CPVC Wafer Type Single Plate Non Return Flap Check Valve
    US $ 100-2,000 /Set
    100 Sets (MOQ)
    Contact Supplier
[Ruoteng] Soft Seal Flap Check Valve Energy-Saving Non-Return CF8 CF8m Stainless Steel Wafer Check Valve

[Ruoteng] Soft Seal Flap Check Valve Energy-Saving Non-Return CF8 CF8m Stainless Steel Wafer Check Valve

US $ 0.1-1 / Piece FOB
1 Piece (MOQ)
More
Main Products: Stainless Steel Pipe Fittings, Stainless Steel Joints, Stainless Steel Elbow, Elbow, Valve, Joint
Contact Supplier
Audited Supplier
Zhejiang Ruoteng Valve Co., Ltd

Manufacturer/Factory & Trading Company

Zhejiang, China Since 2024
Chat Now Send Inquiry
Standard DN100 Pn10 Non-Return Flap Metal Seal Check Valves

Standard DN100 Pn10 Non-Return Flap Metal Seal Check Valves

US $ 650-700 / Ton FOB
100 Tons (MOQ)
More
Pressure : Ordinary Pressure
Contact Supplier
Audited Supplier
TIANYI SUNS PIPE & FITTINGS CO., LTD.

Shanxi, China Since 2011
Chat Now Send Inquiry
Wafer Type Check Valve/Single Door Valve/Non Return Flap Valve for Pharmaceutical Industry

Wafer Type Check Valve/Single Door Valve/Non Return Flap Valve for Pharmaceutical Industry

US $ 5-58 / Set FOB
1 Set (MOQ)
More
Main Products: Butterfly Valve, Ball Valve, Check Valve
Contact Supplier
Audited Supplier
ABC VALVE WUXI CO., LTD.

Manufacturer/Factory & Trading Company

Jiangsu, China Since 2024
Chat Now Send Inquiry

Not exactly what you want?

Post Sourcing Request

About Non Return Flap Valve FAQ

  • QWhat are the benefits of purchasing check valves wholesale for industrial equipment?

    The Non Return Flap Valve is a key item within our extensive Check Valve selection.Buying check valves wholesale allows for cost savings, bulk pricing benefits, and streamlined procurement processes. You can also enjoy customization options, technical support, and timely delivery from a reputable supplier in China.

  • QHow can I identify a trustworthy supplier for check valves in China?

    The Non Return Flap Valve is an essential part of our Check Valve offerings.When searching for a reliable check valve supplier in China, look for certifications, years of experience, and customer reviews. Request samples, check their compliance with industry standards, and ensure they offer quality assurance processes.

  • QWhat are the common uses of check valves in industrial equipment?

    Discover the perfect Check Valve addition with our Non Return Flap Valve.Check valves are vital components used to prevent backflow in pipelines and ensure one-way flow of liquids or gases. They are commonly found in industries such as oil & gas, water treatment, and manufacturing processes.

DIN 3202 Double Flange Cast Iron Non Return Flap Ball Valve

DIN 3202 Double Flange Cast Iron Non Return Flap Ball Valve

US $ 0.5-50 / Piece FOB
1 Piece (MOQ)
More
Connection Form : Flange
Contact Supplier
Audited Supplier
Hebei Yaofa Pipe Industry Technology Development Co., Ltd

Hebei, China Since 2025
Chat Now Send Inquiry
Stainless Steel/Wcb/CF8/ CF8m Single Disc Wafer Type Flap Non-Return Check Valve

Stainless Steel/Wcb/CF8/ CF8m Single Disc Wafer Type Flap Non-Return Check Valve

US $ 25-200 / Piece FOB
1 Piece (MOQ)
More
Main Products: Cast Iron Valve, Cast Steel Valve, Ball Valve, Ductile Iron Pipe Fitting, Forged Flange, Pipe Clamp Fittings, OEM Metal Pipe Fittings, OEM Valve and Pump Parts, OEM Stamping Parts
Contact Supplier
Audited Supplier
Qingdao Fluido Industrial Co., Ltd.

Shandong, China Since 2012
Chat Now Send Inquiry
High Quality PVC Wafer Type Flanged Check Valve UPVC Disc Swing Check Valve Plastic Flap Non Return Check Valve JIS Standard DN20-DN400 (3/4"-16")

High Quality PVC Wafer Type Flanged Check Valve UPVC Disc Swing Check Valve Plastic Flap Non Return Check Valve JIS Standard DN20-DN400 (3/4"-16")

US $ 10.78 / Piece FOB
1 Piece (MOQ)
More
Flow Direction : Unidirection
Contact Supplier
Audited Supplier
Tianjin Runke Plastic Tech Co., Ltd.

Manufacturer/Factory & Trading Company

Tianjin, China Since 2010
Chat Now Send Inquiry
Ductile Cast Iron Manual One-Way Dual Plate Non-Return Wafer Type Flap Check Valve for Water

Ductile Cast Iron Manual One-Way Dual Plate Non-Return Wafer Type Flap Check Valve for Water

US $ 2.8-200 / Piece FOB
1 Piece (MOQ)
More
Main Products: Wafer Butterfly Valve, Flange Butterfly Valve, Lt Butterfly Valve, Ball Valve, Check Valve, Y Strainer, Gate Valve, Globe Valve, Electric 2 Way Valve, Pressure Reducing Valve
Contact Supplier
Audited Supplier
Tianjin Tanggu General Valve Group Co., Ltd.

Manufacturer/Factory & Trading Company

Tianjin, China Since 2025
Chat Now Send Inquiry
OEM Customized Di Ss Body Single Plate Single Disc Wafer Flap Type Check Valve Non Return Valve

OEM Customized Di Ss Body Single Plate Single Disc Wafer Flap Type Check Valve Non Return Valve

US $ 20-80 / Piece FOB
1 Piece (MOQ)
More
Sealing Form : Gland Packings Globe Valve
Contact Supplier
Audited Supplier
TIANYI SUNS PIPE & FITTINGS CO., LTD.

Shanxi, China Since 2011
Chat Now Send Inquiry
Rubber Flap Non-Return Valve with Flanges

Rubber Flap Non-Return Valve with Flanges

US $ 19.41-126.19 / Piece FOB
50 Pieces (MOQ)
More
Main Products: Copper valves, Cast iron valves, Drain valves, Groove pipe fittings & Fire protection valves, HAVC Valves, Stainless steel soft seal, SUS & industrial & specialized valves.
Contact Supplier
Audited Supplier
Huhang Technology Group Co., Ltd.

Manufacturer/Factory & Trading Company

Fujian, China Since 2024
Chat Now Send Inquiry
High Quality PVC Wafer Swing Horizontal Check Valve UPVC Non Return Flap Valve Plastic Disc Vertical Water Check Valve DIN ANSI JIS BS Standard DN20-DN400

High Quality PVC Wafer Swing Horizontal Check Valve UPVC Non Return Flap Valve Plastic Disc Vertical Water Check Valve DIN ANSI JIS BS Standard DN20-DN400

US $ 1.29 / Piece FOB
1 Piece (MOQ)
More
Pressure : Low Pressure
Contact Supplier
Audited Supplier
Tianjin Runke Plastic Tech Co., Ltd.

Manufacturer/Factory & Trading Company

Tianjin, China Since 2010
Chat Now Send Inquiry
Ductile Cast Iron DN200 Non Return Dual Plate Wafer Type Flap Check Valve with CF8m Disc

Ductile Cast Iron DN200 Non Return Dual Plate Wafer Type Flap Check Valve with CF8m Disc

US $ 12-60 / Piece FOB
1 Piece (MOQ)
More
Main Products: Ductile Iron Pipe, Ductile Iron Pipe Fittings, Valve, Joint, Manhole Cover, Gully Grating, Manhole Step, Flange, Water Meter, Water Meter Box
Contact Supplier
Audited Supplier
TIANYI SUNS PIPE & FITTINGS CO., LTD.

Shanxi, China Since 2011
Chat Now Send Inquiry
High Quality Plastic Wafer Type Flange Vertical Swing Check Valve UPVC Single Disc Flanged Horizontal Swing Check Valve PVC Non-Return Flap Check Valve

High Quality Plastic Wafer Type Flange Vertical Swing Check Valve UPVC Single Disc Flanged Horizontal Swing Check Valve PVC Non-Return Flap Check Valve

US $ 10.78 / Piece FOB
1 Piece (MOQ)
More
Connection Form : Flange
Contact Supplier
Audited Supplier
Tianjin Runke Plastic Tech Co., Ltd.

Manufacturer/Factory & Trading Company

Tianjin, China Since 2010
Chat Now Send Inquiry
Thin Check Valve/Single Door Valve/Non Return Flap Valve for Nuclear Power Industry

Thin Check Valve/Single Door Valve/Non Return Flap Valve for Nuclear Power Industry

US $ 5-58 / Set FOB
1 Set (MOQ)
More
Main Products: Butterfly Valve, Ball Valve, Check Valve
Contact Supplier
Audited Supplier
ABC VALVE WUXI CO., LTD.

Manufacturer/Factory & Trading Company

Jiangsu, China Since 2024
Chat Now Send Inquiry
High Quality 25A JIS Standard 10K Plastic One Way Socket Swing Check Valve 1 Inch PVC Flap Non Return Valve (NRV) UPVC Swing Check Valve Manufacturer

High Quality 25A JIS Standard 10K Plastic One Way Socket Swing Check Valve 1 Inch PVC Flap Non Return Valve (NRV) UPVC Swing Check Valve Manufacturer

US $ 1.29 / Piece FOB
1 Piece (MOQ)
More
Application : Industrial Usage, Water Industrial Usage, Household Usage
Contact Supplier
Audited Supplier
Tianjin Runke Plastic Tech Co., Ltd.

Manufacturer/Factory & Trading Company

Tianjin, China Since 2010
Chat Now Send Inquiry
Stainless Steel Check Valve/Single Door Valve/Non Return Flap Valve for Pharmaceutical Industry

Stainless Steel Check Valve/Single Door Valve/Non Return Flap Valve for Pharmaceutical Industry

US $ 5-58 / Set FOB
1 Set (MOQ)
More
Main Products: Butterfly Valve, Ball Valve, Check Valve
Contact Supplier
Audited Supplier
ABC VALVE WUXI CO., LTD.

Manufacturer/Factory & Trading Company

Jiangsu, China Since 2024
Chat Now Send Inquiry
Swing Flap Type Bsp NPT 1/2 Inch Horizontal Brass Non Return Water Check Valve

Swing Flap Type Bsp NPT 1/2 Inch Horizontal Brass Non Return Water Check Valve

US $ 10 / Piece FOB
1,000 Pieces (MOQ)
More
Standard : GB
Contact Supplier
Audited Supplier
Aqua Fitting Pipe Tech (Beijing) Co., Ltd.

Beijing, China Since 2017
Chat Now Send Inquiry
View More

Browse by Categories

Home > Industrial Equipment & Components > Valve > Check Valve > Swing Check Valve
1/64
TOP

Search Filter

Categories

More Less
  • Check Valve
  • Butterfly Valve
  • Gate Valve
  • Ball Valve
  • Other Valves & Parts
  • Control Valve
  • Plastic Pipe
  • Other Pipe Fittings
  • Steam Trap
  • Plumbing Hardware

Application

More Less
  • Water Industrial Usage
  • Industrial Usage
  • Household Usage

Function

More Less
  • Sfcv Rubber Lobe
  • Nrvz Silence
  • Ddcv Double Lobe
  • Nrvr Silence
  • Nrvg Silence

Media

More Less
  • Water
  • Oil
  • Gas
  • Acid

Structure

More Less
  • Swing
  • Butterfly
  • Tubular
  • Elevated

Temperature

More Less
  • Ordinary Temperature
  • Low Temperature
  • High Temperature

Company Type

More Less
  • Manufacturer/Factory
  • Trading Company
  • Group Corporation

Company Location

More Less
  • Tianjin
  • Shanghai
  • Zhejiang
  • Jiangsu
  • Shandong
  • Henan
  • Hebei
  • Shanxi
  • Fujian
  • Guangdong
  • Liaoning
  • Hubei
  • Anhui
  • Beijing
  • Guangxi
Reset Done