Double Shut-off Hydraulic Quick Release Coupling Naiwo Nwp4 ISO16028 Carbon Steel
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Product Highlights
- ISO 16028 Standard Compliance: Meets ISO16028 standard for reliable hydraulic quick coupling performance.
- Safe Lock Mechanism: Features a safe lock design to prevent accidental disconnection during operation.
- Wide Temperature Resistance: Operates from -20C to +100C with Nitrile rubber; optional Fluoride rubber extends to +150C.
- High Pressure Capacity: Max working pressure ranges from 150 bar to 400 bar depending on size.
- Diverse Thread Options: Available with BSP, NPT, and SAE thread types for various connection needs.
- Universal Interchangeability: Compatible with FASTER, PARKER, HANSEN, and AEROQUIP series couplings.
- Durable Carbon Steel Material: Constructed from carbon steel with zinc nickel plating for corrosion resistance.
- Comprehensive 1-Year Warranty: Includes 1-year warranty and after-sales service for peace of mind.
Product Attributes
- Thread Available
- Bsp, NPT, SAE
- Thread
- Bsp NPT
- Standard Seal
- Nitrile Rubber( NBR ),Fluoride Rubber( FKM )
- Model NO.
- NWP4
- Work Temperature
- -20°C~+100°C(NBR); -25°C~+150°C(FKM)
- Advantage
- High Pressure, Corrosion Resistance
- Application
- Forest Equipment, Hydraulic Machinery and Oil Equi
- Transport Package
- Wooden Case/Pallet with Carton Inside
- Specification
- 1/4'' to 2''
- Trademark
- NAIWO
- Origin
- Hebei, China
- Production Capacity
- 100000 Set / Month
Shipping
- Shipping Cost:
- Contact the supplier about freight and estimated delivery time.
Online Trading Protection
- Payment Guarantee
-
Platform-protected payments with refund support for eligible order issues.
- Platform Logistics
- Clearer shipment tracking with platform-supported logistics.
- Inspection Service
- Optional pre-shipment inspection for quality and quantity checks.
- After-Sales & Dispute Handling
- Platform-assisted dispute resolution, including refunds or returns when applicable.
Only orders placed and paid through Made-in-China.com Secured Trading are eligible for payment protection and the corresponding platform services.
Product Images of Double Shut-off Hydraulic Quick Release Coupling Naiwo Nwp4 ISO16028 Carbon Steel
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Product Description


the junction of four provinces. With 20 years of dedicated expertise in fluid
connection solutions, the company boasts well-established global service
capabilities and vigorously expands its foreign trade and export business.
We consistently refine manufacturing techniques and ramp up investment in
R&D and innovation. Our full range of products meet advanced international
standards in performance, service life, safety and sealing performance.




Size (in) | ISO (mm) | Max Working Pressure (bar) | Rated Flow (I/m) | Min Blast Pressure (bar) | Fluid Loss (ml-cc) | ||
Connection | Connection | Male | Female | ||||
1/4 | 6.3 | 400 | 12 | 1900 | 1900 | 1900 | 0.008 |
3/8 | 10 | 350 | 23 | 1600 | 1560 | 1780 | 0.01 |
1/2 | 12.5 | 350 | 45 | 1770 | 1700 | 1590 | 0.012 |
3/4 | 20 | 350 | 74 | 1580 | 1660 | 1420 | 0.015 |
1 | 25 | 350 | 100 | 1840 | 1600 | 1470 | 0.02 |
1-1/4 | 31.5 | 350 | 189 | 1530 | 1470 | 1400 | 0.03 |
1-1/2 | 40 | 230 | 288 | 800 | 700 | 320 | 0.05 |
2 | 50 | 150 | 379 | 600 | 600 | 280 | 0.1 |






A: We focus on a complete line of hydraulic parts, such as hydraulic hose fittings, pipe adapters, flange adapters and custom machined parts for hydraulic systems.
Q: Do you take custom orders?
A: Yes. We offer professional OEM and ODM services. You may send us detailed drawings, specifications or samples, and our R&D team will create products tailored to your needs.
Q: What about your production capacity and delivery time?
A: We have reliable production capacity. Standard items are usually delivered within 7 to 15 days. For customized products, the lead time is generally 20 to 30 days based on complexity.
Q: Can you provide free samples?
A: Sure. We can supply samples for your quality check, but the shipping fee will be covered by you.
About the Supplier
This supplier has been audited by TÜV Rheinland. Verify the report on the official TÜV Rheinland website with ID "MIC-ASR226877". Items marked "" are certified.
Company Profile
Hebei Naiwo Fluid Technology Co. Ltd is located in matou economic development zone of hebei province, China. We are specialized in production of NAIWO brand quick coupling(ISO16028, ISO7241-A, ISO7241-B) with stainless steel, carbon steel and brass material. The quick coupling can be widely used for metallurgy, oil, chemical, food, shipbuilding, agriculture machine, construction machine, special car/truck, paper making, drilling platform and other fields.
We take the "leading technology, excellent quality, perfect service" as the company culture and management concept, focus on strict production procedures and related testing equipment, which help our factory win the clients' praise and trust all over the world.
About Our Factory & Business Background
- Address
- Matou Economic Development Zone, Handan, Hebei, China
- Terms of Payment
- LC, T/T, PayPal, Western Union, Small-amount payment, Money Gram
- International Commercial Terms(Incoterms)
- FOB, CFR, CIF, EXW, Others
- Average Lead Time
-
Peak Season Lead Time: one month
Off Season Lead Time: within 15 workdays - Nearest Port
- TIANJIN, QINGDAO
Our Production Capability & Technical Expertise
- Main Products
- Quick Coupling, Stainless Steel Coupling, Hydraulic Fitting, Pipe Fitting, Quick Coupler
Our Industry Experience & Global Business Record
- Export Year
- 2014-05-01
- Main Markets
- North America, South America, Eastern Europe, Southeast Asia, Africa, Oceania, Mid East, Eastern Asia, Western Europe
FAQ
- What are your main products?
- We focus on a complete line of hydraulic parts, such as hydraulic hose fittings, pipe adapters, flange adapters and custom machined parts for hydraulic systems.
- Do you take custom orders?
- Yes. We offer professional OEM and ODM services. You may send us detailed drawings, specifications or samples, and our R&D team will create products tailored to your needs.
- What about your production capacity and delivery time?
- We have reliable production capacity. Standard items are usually delivered within 7 to 15 days. For customized products, the lead time is generally 20 to 30 days based on complexity.
- Can you provide free samples?
- Sure. We can supply samples for your quality check, but the shipping fee will be covered by you.
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