Yuyao Shangjia Plastic Industry Co., Ltd. is a professional Screw Lotion Pump manufacturer located in Yuyao, Ningbo, Zhejiang, China. We produce plastic threaded pumps, switch pumps, small sprayers and mini spray guns for cosmetic and daily chemical packaging, supported by our wholly-owned automation subsidiary Yuyao Shuangyu Automation Technology Co., Ltd.
Category Positioning
The Screw Lotion Pump category covers our SJ302 model family: seven cap configurations with a threaded closing and press-to-dispense pump action. These pumps suit cleaning, shampoo, hair care and household care products, where controlled output, leak resistance and convenient storage are core requirements.
We approach this range as a factory-based manufacturer, not a trading desk. Our R&D team works on structure, appearance and mold customization, while Shuangyu Automation supports automated production and technical upgrading. That combination gives customers a single partner from sample development to repeat supply.
SJ302 Cap Options
Each model in the family shares the screw-on lotion pump function, but the cap styling changes the visual identity and sometimes the dispensing experience. We match the cap to the brand position and the product format.
| Model |
Cap Style |
Application Fit |
| SJ302-A |
A-Cap |
Clean, simple lines for body wash, shampoo and cleansing milk. |
| SJ302-B |
Duckbill Cap |
Controlled delivery for lotions and thicker personal care formulas. |
| SJ302-C |
C-Cap |
Compact profile for smaller bottles, travel sizes and sample packs. |
| SJ302-D |
D-Cap |
General-purpose personal care and household dispensing. |
| SJ302-E |
Heart-Shaped Cap |
Retail and gift-oriented beauty packaging with stronger shelf identity. |
| SJ302-F |
F-Cap |
Modern styling for daily chemical brands and premium private label. |
| SJ302-G |
G-Cap |
Distinctive cap geometry for brand differentiation on shelf. |
Material and Application Fit
Screw lotion pumps in this range are typically molded in PP plastic, which provides chemical resistance, dimensional stability and a clean surface for color matching. The screw-on design seals the bottle neck and reduces the risk of leakage during storage, travel and transport.
We select the pump structure around the product to be dispensed. Low-viscosity liquids, thick cleansing milks, shampoo and household care solutions each require a different piston fit, spring load and nozzle geometry. During project review, we use your fill product, bottle neck and dosing target to define the right combination.
Critical Specifications
- Output per stroke (cc): defines the dose released with one press and must match the product format and bottle size.
- Neck finish / thread: the pump closure must fit the bottle neck thread; we confirm this before tooling and sample production.
- Dip tube length: matched to bottle height so the pump can reach the lower portion of the product.
- Nozzle and cap design: press-type, duckbill and long-nozzle variants create different flow and application behavior.
- Sealing performance: the threaded closure and internal sealing parts protect against leaks in the bottle and during shipping.
Configuration and Customization
Our R&D team can provide customized service for different molds, allowing us to adapt cap height, surface finish, color and structural details to your brand. We start from the standard SJ302 family, then adjust the parts that affect your packaging line and user experience.
If the project needs a different actuation style, the wider Lotion Pump family includes Left-right Lotion Pump and Long Nozzle Lotion Pump formats for line extensions and new product launches.
Filling Line Integration
Screw lotion pumps are installed on automatic capping machines, so the pump dimensions, thread form and dip tube length must be consistent within tight limits. We produce parts that feed cleanly through capping chutes and maintain alignment through the tightening process.
For large programs, our subsidiary Shuangyu Automation helps keep production repeatable and reduces variation between batches. This is especially important when the same pump model is used across multiple SKUs with different colors or dip tube lengths.
Quality Assurance and Project Flow
We have set up a strict quality control system according to ISO and CE standards. For each screw lotion pump program, we follow a defined project flow: demand confirmation, structural and appearance drawing, sample proofing, sample revision, mass production with inspection, then finished product packaging and delivery.
Throughout the process, our team communicates professionally, listens to feedback and gives practical suggestions before production begins. After delivery, we provide long-term follow-up and support subsequent repeat customization orders.
Information We Use to Configure Your Solution
- Product type and fill goods: viscosity, chemical compatibility, color and fragrance.
- Bottle specification: neck finish, thread size, bottle height and capacity.
- Dosing target: required output per stroke in cc and expected number of doses.
- Pump style: cap variant, nozzle type, dip tube length and actuation feel.
- Appearance: material, color, logo, decoration and packaging layer.
- Order and logistics: quantity, delivery schedule, destination country and packaging requirement.
Frequently Asked Questions
What is the difference between a screw lotion pump and a snap-on lotion pump?
A screw lotion pump uses a threaded closure that rotates onto the bottle neck, creating a mechanical seal and stable fixation. Snap-on pumps are pushed over the neck and are often chosen for faster assembly. We confirm the bottle finish and line capping method before selecting the closure type.
Can you customize the cap design and color?
Yes. Our R&D team provides customized mold services, and the SJ302 family can be adjusted in cap style, surface finish, color and structural detail. Custom colors and decoration are confirmed during sample proofing.
How do we determine the correct output per stroke?
Output per stroke in cc should match the product dose and bottle capacity. Skin care and hair care products usually need a different output than household cleaners. We use your fill product, bottle size and usage scenario to propose the correct pump configuration.
Do you support sample production before mass orders?
Yes. After confirming specifications, our technical team draws structural and appearance drawings, then produces customized samples. We adjust the sample until it is approved, then move to formal mass production with inspection.
Which quality standards do you follow?
We have set up a strict quality control system according to ISO and CE standards. The scope includes incoming material checks, production inspection and finished product control for visual quality, dimensional consistency and pump function.
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