---
product_id: 632504400
title: "Happybuy Air-Operated Double Diaphragm Pump 1/2 inch Inlet & Outlet Cast Iron 12 GPM Max 120PSI for Chemical Industrial Use, QBK-15-1/2"
brand: "happybuy"
price: "VT204241"
currency: VUV
in_stock: false
reviews_count: 5
category: "Happybuy"
url: https://www.desertcart.vu/products/632504400-happybuy-air-operated-double-diaphragm-pump-1-2-inch-inlet
store_origin: VU
region: Vanuatu
---

# Air-operated, 115 PSI max pressure 12 GPM max flow Cast iron durable build Happybuy Air-Operated Double Diaphragm Pump 1/2 inch Inlet & Outlet Cast Iron 12 GPM Max 120PSI for Chemical Industrial Use, QBK-15-1/2

**Brand:** happybuy
**Price:** VT204241
**Availability:** ❌ Out of Stock

## Summary

> ⚙️ Pump up your industrial game with unstoppable flow and rock-solid reliability!

## Quick Answers

- **What is this?** Happybuy Air-Operated Double Diaphragm Pump 1/2 inch Inlet & Outlet Cast Iron 12 GPM Max 120PSI for Chemical Industrial Use, QBK-15-1/2 by happybuy
- **How much does it cost?** VT204241 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.vu](https://www.desertcart.vu/products/632504400-happybuy-air-operated-double-diaphragm-pump-1-2-inch-inlet)

## 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

- • **Powerful 12 GPM Flow:** Delivers industrial-grade fluid transfer with ease and speed.
- • **Leak-Free Bolted Assembly:** Precision bolted construction guarantees reliable, mess-free fluid handling every time.
- • **Smooth, Stall-Free Air Valve:** Modular design ensures low pulsation and maximizes operational efficiency with minimal downtime.
- • **Rugged Cast Iron Construction:** Engineered for corrosion resistance and long-lasting durability in harsh environments.
- • **Versatile Industrial Compatibility:** Perfect for petroleum, mining, water treatment, automotive, and more—be the pro with the pump that adapts.

## Overview

The Happybuy Air-Operated Double Diaphragm Pump features a robust cast iron body, delivering up to 12 gallons per minute at 115 PSI. Its innovative low-pulsation air valve and bolted leak-free design ensure smooth, efficient operation across diverse industrial applications including chemical handling, mining, and water treatment. Built for durability and ease of maintenance, this pump is the go-to choice for professionals demanding performance and reliability.

## Description

Cast Iron Air-Operated Diaphragm Pump 115 PSI 12 GPM Double Diaphragm Air Pump Introduction: This powerful air-operated double diaphragm pump operates from 29 to 120 PSI. 1/2". dia. inlet and 1/2in. dia. outlet capable . 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. Features: Top quality glyd ring, a double-acting seal that delivers better performance Externally serviceable air distribution system and all-bolted construction for convenience Bolted construction for leak-free fluid handling Suitable for general acid and alkali (not suitable for solvent)This type of diaphragm pump is popular in various industries, such as petroleum, metallurgy, mining, coating material, printing, paper making, water treatment, automotive, etc Specifications: Material: Cast IronMax. Fluid Temp. (deg F): 122Max. PSI: 115Outlet Port (in. ): 1/2Flow (GPM): 12Max. Suspended Solids (in. ): 1/8Average Air Consumption (CFM): 10Air Inlet Size [in]: 1/4''Inlet/Outlet Port Size/Standard: 1/2''Flow rate: 2000L/maximum suction: 3mMaximum head: 69m

Review: Works as it should. Couldn't be more happy with it....recently purchased and installed as a water source for an asphalt sealer trailer. Love this pump.
Review: Used to pump oil and works well

## Features

- ♔【MAIN PARAMETER】~Material: Cast Iron; Type: Double diaphragm; Operation Type : Air-operated; Inlet/Outlet Port Size/Standard：1/2"; Air Inlet Size [in]：1/4".
- ♔【Quality Performance】~Maximum Head：226FT/69M, Max Pressure: 115PSI/8BAR. Top quality glyd ring, a double-acting seal that delivers better performance. 1/4 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 |
|---------------|-------|
| ASIN | B07DFGCGFG |
| Brand | Happybuy |
| Colour | QBK-15 - 1/2inch - 12 GPM - Cast Iron |
| Country of Origin | USA |
| Generic Name | Happybuy Cast Iron 12 GPM Max 120PSI for Chemical Industrial Use |
| Included Components | No |
| Item Weight | 4 kg 20 g |
| Item model number | Air-Operated Double Diaphragm Pump |
| Manufacturer | Happybuy |
| Material | Cast Iron |
| Maximum Flow Rate | 12 Gallons Per Minute |
| Maximum Lifting Height | 69 Metres |
| Net Quantity | 1.0 Count |
| Power Source | Pneumatic |
| Product Dimensions | 30.5L x 30.5W x 20.3H Centimeters |
| Style | Diaphragm |
| UPC | 601707142118 617201476536 |

## Product Details

- **Brand:** Happybuy
- **Colour:** QBK-15 - 1/2inch - 12 GPM - Cast Iron
- **Item Weight:** 8.86 Pounds
- **Manufacturer:** Happybuy
- **Material:** Cast Iron
- **Maximum Flow Rate:** 12 Gallons Per Minute
- **Maximum Lifting Height:** 69 Metres
- **Power Source:** Pneumatic
- **Product Dimensions:** 30.5L x 30.5W x 20.3H Centimeters
- **Style:** Diaphragm

## Images

![Happybuy Air-Operated Double Diaphragm Pump 1/2 inch Inlet & Outlet Cast Iron 12 GPM Max 120PSI for Chemical Industrial Use, QBK-15-1/2 - Image 1](https://m.media-amazon.com/images/I/512BTWsaRSL.jpg)
![Happybuy Air-Operated Double Diaphragm Pump 1/2 inch Inlet & Outlet Cast Iron 12 GPM Max 120PSI for Chemical Industrial Use, QBK-15-1/2 - Image 2](https://m.media-amazon.com/images/I/51OPJ2IuMkL.jpg)
![Happybuy Air-Operated Double Diaphragm Pump 1/2 inch Inlet & Outlet Cast Iron 12 GPM Max 120PSI for Chemical Industrial Use, QBK-15-1/2 - Image 3](https://m.media-amazon.com/images/I/51QOm60660L.jpg)
![Happybuy Air-Operated Double Diaphragm Pump 1/2 inch Inlet & Outlet Cast Iron 12 GPM Max 120PSI for Chemical Industrial Use, QBK-15-1/2 - Image 4](https://m.media-amazon.com/images/I/51Sca2ZT4pL.jpg)
![Happybuy Air-Operated Double Diaphragm Pump 1/2 inch Inlet & Outlet Cast Iron 12 GPM Max 120PSI for Chemical Industrial Use, QBK-15-1/2 - Image 5](https://m.media-amazon.com/images/I/51Z3CotzudL.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: Got anything rated 200f? Also gan this pump ethanol**
A: Sorry I do not, I only purchased one of these.  I also don't know if anyone has made a pump out of GaN, gallium nitride. There less expensive materials that would be compatible with ethanol.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by M***T on 11 May 2022*

Works as it should. Couldn't be more happy with it....recently purchased and installed as a water source for an asphalt sealer trailer. Love this pump.

### ⭐⭐⭐⭐⭐ Review
*by P***S on 27 December 2023*

Used to pump oil and works well

### ⭐⭐⭐⭐⭐ Review
*by F***O on 20 December 2018*

Pump is kind of a cheap unit. Paint not the greatest and instructions are in broken English at best. Saving grace is this thing will pump some oil! I used 1" lines with a 3/8" air line. Best to secure the outlet hose because it is like a fire hose! I am only pumping waste oil and gear fluid, have moved about 1,000 gallons and it has not slowed down yet!

## Frequently Bought Together

- Happybuy Air-Operated Double Diaphragm Pump, 1/2 in Inlet & Outlet, Stainless Steel Body, 8.8 GPM & Max 120PSI, PTFE Diaphragm Pneumatic Transfer Pump for Petroleum, Diesel, Oil & Low Viscosity Fluids
- Primefit R1401G Mini Air Regulator with steel-Protected Gauge, 60-Scfm At 100-Psi, 1/4" Npt

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*Product available on Desertcart Vanuatu*
*Store origin: VU*
*Last updated: 2026-02-26*