- Model No.: DN 40 - DN 150
- Connection: Flanged Diaphragm Valve
- Structure: 2 Way Valve
- Flow Direction: Reversing
- Usage: Flow Control
- Model: Water Treatment Diaphragm Valves
- Material: PA6
- Manufacturer: Yes
- Size: 2" - 6"
- Control Method: Air or Liquid
- Transport Package: 43*28*27 cm
- Origin: Changzhou, China
- Actuator: Electric
- Material: Nylon
- Pressure: High Temperature
- Function: Solenoid Valve, Electronic Type
- Standard: GB, JIS
- Color: Black
- Max Pressure: 1 MPa
- OEM: Yes
- Chemical Resistant: Yes
- Trademark: Duoling
- Specification: DN50 - DN150
- HS Code: 8481802990
PA6 Nylon Water Hydraulic 2 Way Diaphragm Solenoid Valve
1. Water treatment diaphragm valves
2. Hydraulic or Pneumatic operation
3. Competitive manufacturing price
4. Durable and refined design
Our water treatment diaphragm valves are made from PA6 nylon, making them lighter and rust-resistant compared to traditional iron models. They are also treated with anti-aging agents to prevent degradation from sunlight exposure. Each valve undergoes a pressure test of 15 kg before shipping.
Below is the working process for its internal structure:


1. These water treatment diaphragm valves can be used in sand filters, replacing two sets of electric or pneumatic valves, offering easy control;
2. Made from PA6 (Nylon) material, with a maximum working pressure of 1.0 MPa;
3. Features a clamp connection for quick and easy installation and removal;
4. Resists corrosion and rust, suitable for weak acid environments;
5. Excellent aging resistance, ideal for outdoor use;
6. Fast switching and stable performance;
7. Easy to replace parts, low maintenance cost;
8. The diaphragm is made from advanced rubber with high elasticity, reinforced with imported high-strength fabric for better rebound;
9. Equipped with bilateral waterproof rubber seals to prevent leakage;
10. Features a top hold hoop for enhanced safety and easier internal part replacement;
11. Finished with professional nylon paint for an attractive appearance.
Shipping Methods:
1. Express delivery (DHL, TNT, UPS, FEDEX, EMS) – ideal for small or urgent orders.
2. Sea freight – suitable for bulk orders.
3. Air freight – for time-sensitive shipments.
Delivery Time:
Typically 5–7 days for sample orders and 7–15 days for regular orders after payment is received via T/T or W.U. (excluding weekends).
If we have stock available, we will ship your order immediately upon receiving your payment.
Returns Policy:
Situation 1: If no quality issues are found, returns are not accepted. If the issue is not caused by us, we will send spare parts at your expense to resolve the problem.
Situation 2: For any quality issues on our end, we offer a full refund for returns within 15 business days of delivery. We can also repair or replace the product as needed.
Payment Methods:
We accept T/T, L/C, Western Union, and cash payments. Please send a scanned copy of your payment receipt via email to expedite the order processing.
 Warranty:
All products come with a minimum 1-year warranty. If any quality issues occur during this period, we will provide free replacements or accept returns as needed.
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