---
product_id: 521728300
title: "Happibuy Air-Operated Double Diaphragm Pump Aluminum 35 GPM Double Diaphragm with 1 inch Inlet and Outlet Diaphragm Pump Max 120PSI (QBY4-25L)"
brand: "happybuy"
price: "€ 226.56"
currency: EUR
in_stock: true
url: https://www.desertcart.com.cy/products/521728300-happibuy-air-operated-double-diaphragm-pump-aluminum-35-gpm-double
store_origin: CY
region: Cyprus
---

# Air-operated with 1/2 inch NPT air inlet 35 GPM max flow rate Aluminum rugged corrosion-resistant body Happibuy Air-Operated Double Diaphragm Pump Aluminum 35 GPM Double Diaphragm with 1 inch Inlet and Outlet Diaphragm Pump Max 120PSI (QBY4-25L)

**Brand:** happybuy
**Price:** € 226.56
**Availability:** ✅ In Stock

## Summary

> 🚀 Pump Up Your Productivity with Industrial-Grade Power!

## Quick Answers

- **What is this?** Happibuy Air-Operated Double Diaphragm Pump Aluminum 35 GPM Double Diaphragm with 1 inch Inlet and Outlet Diaphragm Pump Max 120PSI (QBY4-25L) by happybuy
- **How much does it cost?** € 226.56 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.cy](https://www.desertcart.com.cy/products/521728300-happibuy-air-operated-double-diaphragm-pump-aluminum-35-gpm-double)

## Best For

- happybuy enthusiasts

## Why This Product

- Trusted happybuy brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Built to Last:** Crafted from durable aluminum with corrosion resistance for long-lasting, leak-free fluid handling.
- • **Precision Engineering:** Top-quality nitrile diaphragms and double-acting seals guarantee reliable, high-pressure performance up to 120 PSI.
- • **Effortless Air Operation:** Standard 1/2 inch NPT air inlet ensures smooth, stall-free air distribution for minimal downtime.
- • **Power Through Performance:** Delivers a robust 35 gallons per minute flow rate to keep your operations running at peak efficiency.
- • **Versatile Industrial Workhorse:** Perfectly engineered for water, low viscosity petroleum fluids, and various industrial applications.

## Overview

The Happibuy Air-Operated Double Diaphragm Pump (QBY4-25L) is a high-performance, aluminum-bodied pump delivering up to 35 GPM flow rate and 120 PSI max pressure. Featuring a 1-inch inlet/outlet and a 1/2 inch NPT air inlet, it offers rugged corrosion resistance and smooth, stall-free air operation. Ideal for water and low viscosity petroleum fluids, this pump combines durability with versatile industrial use, backed by a two-year warranty.

## Description

Air-Operated Double Diaphragm Pump Aluminum 35 GPM Double Diaphragm with 1 inch Inlet and Outlet Diaphragm Pump Max 120PSI (QBY4-25L)This diaphragm pump is about 35 GPM Air-Operated Double Diaphragm Pump with 1 Inch Inlet And Outlet. This powerful air-operated double diaphragm pump QBY4-25L features a 1in. inlet and 1in. outlet capable of pumping up to 35 gallons/min at temperatures up to 150 degrees F.Perfect for use with water. Ideal for use with low viscosity petroleum fluids including diesel, kerosene, motor oil and some waste oil. Can not use for corrosive liquid!!!Feature: Brand new with top qualityAir-operated double diaphragm pumpWith 1 inch inlet and outlet1/2 Inch air inlet1/8 Inch max diameter suspended solidsPerfect for use with waterIdeal for use with low viscosity petroleum fluidsSolid constructionTwo years warrantySpecifications: Product:Diaphragm pumpType:Double diaphragmOperation Type:Air-operatedModel:QBY4-25LBody Material:AluminumInlet Port:1 inch(25 mm)Outlet Port:1 inch(25 mm)Air Inlet Size:NPT 1/2 inch(12.7 mm)Average Air Consumption:38 CFMMax Flow Rate:9 m3/h(35 GPM)Suction:0-5 m(0-16.4 ft)Max Suspended Solids:3 mm(1/8 inch)Max Head:84 m(275.59 ft)Max PSI:120 psiMax Temp:150℉Self-Priming Dry:3 m(10 ft)Self-Priming Wet:4.6 m(15 ft)Manifold Connection:SingleValve Type:BallBall Material:AcetalCheck Seat Material:PolypropyleneDiaphragm Material:NitrilePackage Size:35 x 26 x 23 cm(13.78 x 10.24 x 9.06 inch)Gross Weight:9.86 kg(21.74 lbs)Package Content: 1 x Air-Operated Double Diaphragm Pump1 x Product Manual

## Features

- 【MAIN PARAMETER】Material: Aluminum; Diaphragm Material: Nitrile; Type: Double diaphragm; Operation Type: Air-operated; Inlet/Outlet Port Size/Standard：1 inch (25 mm); Air Inlet Size: NPT 1/2 inch (12.7 mm)
- 【Quality Performance】Maximum Head：275.59FT/84M, Max Pressure: 120PSI. Max Temp : 150 ℉. Top quality glyd ring, a double-acting seal that delivers better performance. 1/2 inch air inlet with NPT fitting uses standard shop air for easy operation.
- 【UNIQUE DESIGN】Features an externally serviceable air distribution system and all-bolted construction. Modular air valve is stall-free,this low pulsation air valve provides smooth and rapid changeover for increased efficiency and minimizes down time.
- 【EXCELLENT CONSTRUCTION】Rugged construction - resists corrosion for reliable performance and long life.Bolted construction is designed for leak-free fluid handling.
- 【VERSATILE USE】The diaphragm pump with convenient operating are widely used in various industries, such as petroleum, metallurgy, mining, coating material, printing, paper making, water treatment, automotive etc.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Happibuy |
| Part Number | diaphragm pump |
| Product Dimensions | 19.81 x 17.78 x 83.82 cm; 8.62 kg |
| Item model number | QBY4-25L |
| Colour | Qby4-25l |
| Style | Diaphragm |
| Material | Aluminum |
| Power Source | Air-Powered |
| Item Package Quantity | 1 |
| Flow rate | 35 Gallons Per Minute |
| Batteries included? | No |
| Batteries Required? | No |
| Item Weight | 8.62 kg |

## Product Details

- **Brand:** Happybuy
- **Colour:** Qby4-25l
- **Material:** Aluminum
- **Style:** Diaphragm
- **Power source:** Air-Powered
- **Item weight:** 19 Pounds
- **Maximum flow rate:** 35 Gallons Per Minute
- **Maximum lifting height:** 275 Feet
- **Global Trade Identification Number:** 00789458202135
- **Manufacturer:** Happibuy

## Images

![Happibuy Air-Operated Double Diaphragm Pump Aluminum 35 GPM Double Diaphragm with 1 inch Inlet and Outlet Diaphragm Pump Max 120PSI (QBY4-25L) - Image 1](https://m.media-amazon.com/images/I/71I0xqMpiZL.jpg)
![Happibuy Air-Operated Double Diaphragm Pump Aluminum 35 GPM Double Diaphragm with 1 inch Inlet and Outlet Diaphragm Pump Max 120PSI (QBY4-25L) - Image 2](https://m.media-amazon.com/images/I/71wnGwUvp3L.jpg)
![Happibuy Air-Operated Double Diaphragm Pump Aluminum 35 GPM Double Diaphragm with 1 inch Inlet and Outlet Diaphragm Pump Max 120PSI (QBY4-25L) - Image 3](https://m.media-amazon.com/images/I/711OApnhbqL.jpg)
![Happibuy Air-Operated Double Diaphragm Pump Aluminum 35 GPM Double Diaphragm with 1 inch Inlet and Outlet Diaphragm Pump Max 120PSI (QBY4-25L) - Image 4](https://m.media-amazon.com/images/I/71oRuhBubRL.jpg)
![Happibuy Air-Operated Double Diaphragm Pump Aluminum 35 GPM Double Diaphragm with 1 inch Inlet and Outlet Diaphragm Pump Max 120PSI (QBY4-25L) - Image 5](https://m.media-amazon.com/images/I/71u-+nKmGnL.jpg)

## Questions & Answers

**Q: Will this pump go on neutral when you close the valves?**
A: This pump is pneumatic. The material is pushed in one direct when the air valve is turned on.

**Q: Where woukd i find a rebuild  kit for this pump if i needed one? Any part numbers or kits?**
A: I am having the same problem no parts available as far as I can see I have been searching for hours and still no luck.

**Q: Do you have 3" or 4"**
A: 2”

**Q: rebuild kit for qpk15?**
A: Just because you put a question mark at the end of a statement doesn't make it a question. I recommend looking at previously answered questions. This is a cheap Chinese clone of an industrial pump. If you need rebuilt kits, buy a pump from a pump supply company.

## Frequently Bought Together

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*Product available on Desertcart Cyprus*
*Store origin: CY*
*Last updated: 2026-01-30*