PCND Dripper

Product Overview

The PCND Dripper is a high-performance, on-line emitter engineered for the most demanding irrigation scenarios. It integrates precision Pressure Compensation (PC) with a definitive Non-Drain (ND) mechanism, establishing it as the premier solution for Subsurface Drip Irrigation (SDI), high-frequency pulse irrigation, and complex, uneven terrains.

Its integrated anti-siphon feature provides critical protection for SDI systems by preventing clogging from soil and debris ingestion at shutdown. Simultaneously, the non-drain function ensures laterals remain full, enabling instantaneous and uniform water delivery across the entire system. This dripper is not just a component; it’s an engineering solution for precision agriculture.

• Superior Uniformity: Delivers precise flow rates (2, 4, or 8 L/h) across an exceptionally wide pressure range (0.6–3.5 bar).
• Critical Clogging Prevention (Anti-Siphon): Essential for Subsurface Drip Irrigation (SDI). The mechanism seals at shutdown to block soil, sand, and debris suck-back.
• Instant Water Delivery (Non-Drain): Ideal for pulse irrigation in greenhouses. Laterals stay primed, eliminating refill delays and ensuring immediate, uniform system response.
• Long-Life Performance: Features a high-grade silicone diaphragm for unmatched precision, extended operational life, and superior resistance to agrochemicals and fertilizers.

Technical Specifications

This datasheet provides the core engineering parameters for system design, specification, and comparison.

Core Technology: The PCND Mechanism Explained

The reliability of the PCND Dripper lies in its advanced, dual-function diaphragm.

How Pressure Compensation (PC) Achieves Uniformity

Our PCND dripper utilizes a large, highly sensitive silicone diaphragm that automatically adjusts its internal flow path in response to pressure changes. On steep slopes or in exceptionally long laterals where pressure varies, the diaphragm flexes to regulate the water passage. This ensures that every dripper—from the first to the last—delivers its precise target flow rate (e.g., 4 L/h) consistently, as long as the system pressure remains within the 0.6 to 3.5 bar compensation range.

The Anti-Siphon & Non-Drain (ND) Function

The ND feature is the key differentiator for advanced applications.

• At Shutdown: When system pressure drops below the 0.15 bar sealing threshold, the diaphragm instantly and firmly seals the outlet. This “Non-Drain” action holds the full water column within the lateral pipes, preventing drainage in low-lying areas and stopping leaks.
• Preventing Clogging (Anti-Siphon): In Subsurface Drip Irrigation (SDI), this sealed state is critical. It creates an air gap that breaks the vacuum (siphon effect) which would otherwise suck soil, fine sand, and contaminants back into the dripper as the pipes empty. This is the primary defense against internal clogging in SDI.
• Instant Activation: Because the pipes remain full and pressurized, the system delivers water to all drippers simultaneously upon the next startup. This “instant-on” capability is essential for short-cycle pulse irrigation.

Advanced Applications for Professional Growers

1. Subsurface Drip Irrigation (SDI)

The anti-siphon mechanism is non-negotiable for SDI success. By physically preventing soil ingestion (suck-back) during system shutdown, the PCND dripper protects the entire system from internal clogging, securing your long-term capital investment buried underground.

2. Pulse Irrigation & Greenhouses

In high-tech greenhouses and soilless media cultivation (e.g., coco coir, rockwool), pulse irrigation (short, frequent watering cycles) is vital for precisely managing the root zone’s water content (WC) and electrical conductivity (EC). The ND feature ensures that every pulse is instantaneous and perfectly uniform, as the system does not waste time or water refilling empty pipes. This provides the unparalleled control required for high-yield crop steering.

3. Slopes, Vineyards, and Uneven Terrain

For orchards or vineyards planted on hillsides, standard drippers cause chronic overwatering at the bottom of the slope and underwatering at the top. Our PC mechanism (0.6-3.5 bar) completely neutralizes this elevation-based pressure differential, guaranteeing that every plant receives its exact water and nutrient allotment, regardless of topography.

Installation and System Compatibility

• Easy Installation: Use a standard 4mm punch tool to insert the PCND dripper’s barb inlet directly into 16mm, 20mm, or larger PE lateral supply pipes.
• Micro-Tube Ready: The 5mm nipple outlet (barb) connects securely to 3/5mm or 4/7mm micro-tubing, allowing you to deliver water with pinpoint accuracy to the plant base, pots, or containers.

Bulk Ordering & Logistics for B2B Clients

As a dedicated manufacturer and global supplier of high-performance irrigation solutions, we are structured to support irrigation contractors, distributors, and managers of large-scale agricultural projects.

• Standard Packaging: 1,000 Pcs / PE Bag; 10,000 Pcs / Master Export Carton
• MOQ: Please contact our technical sales team for project-based pricing and Minimum Order Quantity (MOQ).
• Lead Time: Standard models (2L/h, 4L/h, 8L/h) are stocked or have rapid production cycles available for bulk export.

Frequently Asked Questions (FAQ)

Q1: What is the main difference between a PC dripper and a PCND dripper?

A: A standard PC (Pressure Compensating) dripper only adjusts flow rate based on pressure. A PCND (Pressure Compensating Non-Drain) dripper does that plus features an Anti-Siphon / Non-Drain mechanism. It seals the dripper when the system turns off, which prevents drainage and, crucially, blocks soil suck-back in SDI applications.

Q2: Why is the 0.15 bar (1.5m) sealing pressure important?

A: This is the precise pressure at which the non-drain feature activates. A low, accurate sealing pressure ensures the system seals quickly to prevent leaks and hold water, while still allowing mainlines to drain if necessary for maintenance.

Q3: Can I use PCND drippers for regular surface irrigation on flat ground?

A: Absolutely. While essential for SDI and pulse irrigation, the non-drain feature is highly beneficial on any system. It ensures faster system startup and more uniform watering during short irrigation cycles, saving water and time.

Q4: Why use a silicone diaphragm instead of EPDM rubber?

A: Silicone offers superior elasticity, a much longer operational life, and significantly higher resistance to common agricultural chemicals, acids, and fertilizers. This ensures the dripper’s PC and ND precision are maintained for many seasons, even under harsh conditions.

Q5: Can I get samples for testing?

A: Yes. We strongly encourage irrigation designers, engineers, and farm managers to request samples for field testing. We are confident our dripper’s performance will meet your project’s technical requirements.

Get a Quote for Your Next Project

Ready to solve your most complex irrigation challenges? Contact our engineering team for technical support or request a quotation for your project.