Stenner Peristaltic Pump 85MJH7A2S Adjustable 2-40 GPD 100 PSI

Description

Product Overview

The Stenner 85MJH7A2S peristaltic pump is engineered for high‑precision metering in demanding industrial environments. Built by the reputable Stenner Pump Company, this model combines a robust housing with an adjustable head that can be fine‑tuned to deliver flow rates ranging from 2 to 40 gallons per day (gpd). The pump operates at a maximum pressure of 100 psi, ensuring consistent delivery even when system resistance varies. Its 120‑volt power requirement aligns with standard North American electrical infrastructure, simplifying integration into existing plant layouts. The compact dimensions—13 inches in length, 9 inches in width, and 8 inches in height—allow the unit to fit into confined spaces, while the lightweight design at 8.25 pounds eases handling during installation and maintenance.

Key construction elements include a chemically resistant tubing set that minimizes degradation from chlorine exposure, a stainless‑steel drive shaft for long‑term durability, and a sealed motor compartment that protects internal components from dust and moisture. The pump’s adjustable head utilizes a precision‑machined cam mechanism, granting users the ability to calibrate flow without the need for specialized tools. This flexibility makes the 85MJH7A2S an ideal choice for applications such as water treatment plants, cooling tower systems, and chemical dosing stations where exact dosage control is critical.

Usage

Designed for a broad range of industrial scenarios, the Stenner peristaltic pump excels in water treatment facilities where chlorine injection must be accurate and reliable. It is equally effective in chemical processing lines that require precise metering of corrosive agents, as well as in HVAC cooling tower circuits where biocide dosing helps prevent microbial growth. The pump’s adjustable head enables operators to quickly adapt to changing flow demands, making it suitable for seasonal variations in water usage or for processes that shift between batch and continuous operation.

Installation is straightforward: the pump can be mounted on a standard 4‑inch pipe flange, and the tubing can be routed through existing conduit pathways with minimal modification. Because the pump runs on 120 V, it can be powered directly from typical plant panels without the need for transformers or additional wiring. The device’s low noise level and smooth operation also make it appropriate for indoor environments where acoustic considerations are important, such as laboratories or clean rooms.

Maintenance routines are simplified by the pump’s modular design. The tubing can be replaced in under ten minutes, and the motor can be accessed without disassembling the entire unit. This reduces downtime and keeps operational costs low, a critical factor for facilities that operate 24/7. The pump’s durability has been validated by its ranking as #66 in the Peristaltic Metering Pumps category on Amazon, reflecting strong customer confidence and real‑world performance.

Why Choose Us

When selecting a metering pump, reliability, precision, and support are paramount. Stenner brings over five decades of expertise in pump technology, and the 85MJH7A2S model embodies that legacy. Each unit undergoes rigorous quality testing, including pressure endurance, flow accuracy, and material compatibility assessments, ensuring that the pump meets or exceeds industry standards. Our commitment to customer satisfaction extends beyond the point of sale; we provide comprehensive technical documentation, installation guides, and responsive after‑sales service to address any questions that arise during the product lifecycle.

In addition to the robust construction, the pump offers a unique combination of adjustable flow range and high pressure capability that is rarely found in a single device at this price point. This versatility reduces the need for multiple pumps or additional flow‑control equipment, delivering cost savings and simplifying system design. Our warranty covers manufacturing defects for two years, and we offer optional extended service plans that include routine calibration checks and priority parts replacement.

Choosing Stenner means partnering with a brand that prioritizes engineering excellence, environmental responsibility, and long‑term reliability. Our pumps are designed to minimize energy consumption while maintaining performance, contributing to lower operational expenses and a smaller carbon footprint for your facility.

Key Features

• Adjustable head provides precise flow control from 2 to 40 gpd, allowing fine‑tuning for diverse applications.
• Maximum pressure rating of 100 psi ensures consistent dosing even under high‑resistance conditions.
• Compact 13 × 9 × 8 in footprint and lightweight design simplify installation in tight spaces.
• Durable, chlorine‑resistant tubing and stainless‑steel components extend service life and reduce replacement frequency.
• Comprehensive after‑sales support, including technical assistance, warranty coverage, and optional extended service plans.

FAQ

What flow range can the pump handle?

The pump’s adjustable head allows flow rates from 2 to 40 gallons per day, giving users flexibility to match exact dosing requirements.

Is the pump compatible with standard 120 V power supplies?

Yes, the 85MJH7A2S operates on a standard 120‑volt AC supply, making it easy to integrate into most North American industrial electrical systems.

How often does the tubing need to be replaced?

With proper chemical compatibility and routine maintenance, the tubing typically lasts 12‑18 months in chlorine dosing applications, but it can be swapped out quickly if wear is observed.

Can the pump be used for chemicals other than chlorine?

Absolutely. The pump’s chemically resistant construction is suitable for a variety of dosing liquids, including biocides, acids, and neutralizing agents, provided the tubing material is selected for the specific chemical.

What warranty does Stenner provide?

The pump comes with a two‑year limited warranty covering manufacturing defects, and customers can purchase extended service agreements for additional peace of mind.