hydroponic greenhouse company, builders | Weifang Sainpoly Greenhouse Technology Co.,Ltd

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Product Advantages

High Yield and High Efficiency: Nutrients are directly supplied to the root system, resulting in crop growth approximately 30-50% faster than soil cultivation. Vertical farming is possible, significantly increasing yield per unit area.

Resource Conservation: The closed-loop recycling system saves over 90% of water, increases fertilizer utilization by approximately 70%, virtually eliminates soil-borne diseases, and drastically reduces pesticide use.

Stable and Controllable Quality: Precise control of nutrient and environmental parameters results in clean, uniform crops with low nitrate content, enabling year-round continuous production without seasonal limitations.

Environmentally Friendly: Eliminates soil-related cropping obstacles, reduces agricultural non-point source pollution, and is particularly suitable for areas with limited arable land or poor soil conditions.

Product Parameters

Greenhouse Structure

Single span:	8m, 9.6m, 12m (common)
Eave height:	4m – 6m (needs to meet the needs of multi-layer cultivation or tall-vine crops)
Covering material:	Glass, polycarbonate sheet, or high-transparency film, light transmittance >70%

Cultivation System:

Cultivation trough/pipe slope:	NFT system: 1:75 to 1:100 (ensuring thin-layer flow of nutrient solution)
Cultivation density (taking lettuce as an example):	20-40 plants/m² (flatland) or up to 60 plants/m² or more for vertical cultivation
Nutrient solution layer depth (DFT):	5-20 cm

Water and Fertilizer System:

Nutrient solution tank capacity:	Approximately 1.5-2 times the daily circulation volume, typically 20-50 m³/hectare
EC value (electrical conductivity):	1.0-3.0 mS/cm (precisely adjusted according to crop and growth stage, e.g., 1.0 for lettuce seedlings, 1.8 for later stages)pH value 5.5 - 6.5 (Optimal range for most crops)
Nutrient solution temperature:	18 - 24°C (Optimal range for roots, often requires heating or cooling)
Dissolved oxygen (DO):	> 6 mg/L (Key parameter, usually maintained through aeration, circulation, or aerators)

Environmental Control

Temperature:	Daytime: 20-28°C, Nighttime: 15-18°C (Crop-specific settings)
Relative humidity:	60% - 80% (Can be controlled via dehumidification/humidification)
CO₂ concentration:	800 - 1500 ppm (Supplementation can significantly increase yield)

Core Performance

Water saving rate (compared to soil cultivation):	Up to 90% or more
Yield increase (compared to soil cultivation):	Leafy vegetables can achieve 30%-50% or higher
Production cycle (taking lettuce as an example):	8-12 crops can be grown per year, with each crop lasting approximately 25-35 days (depending on variety and light and temperature conditions)

Covering material

PEP plastic film: chemically stable, heat-resistant, antifreeze, waterproof, moisture-proof, and drip-proof.

Thickness: 0.12mm/0.15mm/0.18mm/0.2mm;

Lifespan: more than 8 years.

Warranty: 3 years.

Sunlight Panel Version

Its multi-layered hollow structure contains a layer of still air, providing more than twice the thermal insulation (U-value) of single-pane glass, resulting in significant energy savings. Simultaneously, it is lightweight (approximately 1/12 the weight of glass), extremely impact-resistant (more than 200 times stronger than glass), and converts direct sunlight into more uniform diffused light, beneficial for crop growth.

When selecting a glass system, thickness (commonly 4mm, 6mm, 8mm, 10mm) and number of layers (double or triple) are crucial, directly determining insulation performance and cost. A surface UV-resistant coating is essential to ensure a weather-resistant lifespan of over 10 years.

In summary, it is a high-performance option balancing insulation, safety, lifespan, and cost, particularly suitable for greenhouse projects with stringent energy consumption and disaster resistance requirements.

Glass Version

For optimal light transmission and production volume: ultra-clear glass is the first choice.

For uniform and high-quality lighting: choose diffused glass.

For energy conservation in extremely cold regions: consider double-glazed windows.

To control initial investment: use ordinary float glass.

system

Cooling system Exhaust fan has the galvanized housing, a large aluminum wheel, a 0.8mm frame, and a 0.4mm thick blind. The cooling pad is made of polymer wet curtain paper, which is a special product that has been specially treated to have high structural strength, corrosion resistance, and excellent air permeability and water resistance. The air enters the greenhouse through the cooling pad, which has the effect of cooling, moistening and dust removal.
Heating system Greenhouse heating system refers to a set of suitable heating facilities selected to meet heating needs, including heat source, heat dissipation facilities, and heat transfer facilities. The main accessories include boilers, transmission pipelines, circulating water, radiators, and various control or regulating valves.
Shading system Internal shading is installed inside the greenhouse, fixed to the structure and matched with the frame; its net is made of white aluminum foil and secured by white support wires, achieving 65% shading rate via light reflection. External shading is fixed outside the greenhouse frame and supported by columns and beams; its net is made from HDPE, PE, PB, PVC, recycled/new materials, etc., treated with UV stabilizers and anti-oxidants for high tensile strength, aging/corrosion/radiation resistance and light weight, secured by black support wires, and delivers a better 75% shading rate through light absorption.
Irrigation system Its working principle is to draw irrigation water from the source, pressurize, purify and filter it, then deliver it to field irrigation facilities via pipelines. Drip arrows suit soilless cultivation (3–4 per meter, 1.6m planting spacing), including main pipelines (φ50–φ63), connectors, φ16/1.2mm PE pipes and drip arrow four-piece sets, excluding fertilizer applicators. Drip irrigation applies to ground planting (drip tape spacing 0.8m, φ20/16 PE pipes), with components including water pumps, proportional fertilizer applicators, main pipelines (φ32–φ63), PE pipes and connectors.
Fertilization system Fertilization system: You can choose the corresponding type according to actual needs, manual type, electric type, smart type, and can be connected to mobile phones and computers for remote control. More details will be shown in the proposal.
Control system Designed for agricultural greenhouses, environmental control and weather observation, this automatic system monitors key agricultural factors including wind speed/direction, air/soil temperature and humidity, air pressure, rainfall, solar radiation and UV intensity. Users can choose between ordinary power distribution cabinets and intelligent temperature control systems. The latter uses outdoor weather stations and indoor sensors to detect and record temperature, humidity, light, CO₂ concentration, substrate temperature and humidity, and supports remote control via computer and mobile phone.

Applications and cultivation

Hydroponic greenhouses are primarily used in modern agricultural settings where high yield, quality, and production controllability are crucial, such as urban agriculture, vertical farms, plant factories, high-end vegetable bases, and scientific research and education. They mainly cultivate crops with root systems adapted to aquatic environments and short growth cycles, typically including various leafy vegetables (such as lettuce and spinach), herbs, strawberries, and fruiting vegetables like tomatoes and cucumbers. Through precise nutrient solution control, they achieve clean, efficient, and year-round continuous production.

About Us

Weifang Sainpoly Greenhouse Equipment Co., Ltd. is located in Weifang City, Shandong Province, covering an area of 32,000 square meters. With deep expertise in the agricultural greenhouse sector, the company is one of China's leading greenhouse manufacturing enterprises.

We focus on the production, sales, and technical services of greenhouse materials, offering advanced greenhouse design solutions. We are also a professional supplier of various greenhouse types, including arch greenhouses, film greenhouses, polycarbonate sheet greenhouses, glass greenhouses, hydroponic greenhouses, and shade greenhouses.

With 16 years of production experience and 11 years of export expertise, our annual production capacity reaches 100 hectares. Currently, our business covers most provinces in China and over 80 countries and regions worldwide, including the UK, France, Germany, the USA, Canada, Congo, South Africa, Uzbekistan, the UAE, and Singapore.