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Are You Finding Your Flow... or Is Your Flow Finding You?

Writer: Coastal Reliability
Coastal Reliability
Sep 9
3 min read

Updated: 3 days ago

 Maric constant flow control valves lineup by Coastal Reliability.
 Maric constant flow control valves lineup by Coastal Reliability.

There is a lot of talk these days about "finding your flow," or to "Go with the flow". Wellness gurus preach fluidity.


But Engineers? Engineers just want the flow rate to stay at exactly 50 GPM without someone turning a manual valve or an actuator glitching out.

When life gives you pressure fluctuations, staying flexible is great advice—especially if you're a precision-molded EPDM control rubber ring. But in industrial fluid handling, an unpredictable flow rate isn't a relaxed vibe. It leads to pump cavitation, media filter washouts, burnt-out motors, and unneeded energy bills.


At Coastal Reliability, we believe in bringing a human touch—and a little relief—to heavy technical challenges. That is why we supply Maric Flow Control technology: the simplest, most dependable way to lock in a constant flow rate.


The 30-Second Fact Check: What Maric Valves DO (and DON'T) Do

WHAT IT DOES: Automatically delivers a fixed, pre-set, constant flow rate of water or liquid, regardless of pressure differential variations across the valve.

WHAT IT DOES NOT DO: It is not designed to control pressure. It contains no external actuations and is not adjustable for flow rate in the field.


How Pure Mechanical Ingenuity Works


Instead of complex electronics, motorized actuators, or wearing mechanical linkages, the core technology relies on a precision-molded rubber control ring fitted inside the valve body:

As pressure increases, the flexible rubber orifice instantly reduces its diameter to restrict flow. As pressure decreases, the orifice opens back up, maintaining the exact same pre-set flow rate.
As pressure increases, the flexible rubber orifice instantly reduces its diameter to restrict flow. As pressure decreases, the orifice opens back up, maintaining the exact same pre-set flow rate.

  1. When pressure differential increases: The orifice diameter of the flexible rubber ring reduces in direct response, maintaining the exact pre-set flow rate.

  2. When pressure differential decreases: The orifice diameter expands automatically to allow the required volume through, preserving constant flow.


Because the controlling element is flexible rubber, normal operation causes it to flex continuously. This flexing action naturally prevents scale build-up on the rubber's surface, keeping the valve self-cleaning and maintenance-free.


Key Features & Operational Benefits


  • 100% Tamperproof Design: Maric valves are non-adjustable. Once installed, operators or field technicians cannot alter settings or attempt to "get more from the bore".

  • Zero Maintenance & 20-Year Lifespan: With no wearing mechanical parts, these valves require no routine maintenance, adjustment, or cleaning over an expected lifespan of up to 20 years.

  • Lower Energy & Minimal Headloss: Unlike standard gate valves or fixed orifices that remain restrictive at duty points, a Maric valve's orifice opens up as pressure drop reduces, resulting in significantly lower headloss and reduced pumping energy costs.

  • Certified Quality: Manufactured under externally audited Quality Assurance systems and backed by WaterMark Quality Certification.


Proven Industry Applications


  • Centrifugal Pump Protection: Prevents submersible and surface pumps from "running off their curve," protecting against cavitation, up-thrusting, and motor overloading during drawdown or empty pipe start-ups.

  • Gland-Water & Mechanical Seal Control: Supplies a constant, reliable flow of gland water to slurry pump stuffing boxes regardless of discharge pressure changes.

  • Water & Wastewater Treatment: Controls backwash flow rates in media filters to prevent media loss, regulates Reverse Osmosis (RO) membrane feed flow, and controls brine discharge.

  • Gland & Safety Systems: Regulates flow to safety showers, eye-wash stations, dust suppression sprays, and chemical dosing systems.


Available Specifications Through Coastal Reliability

Coastal Reliability provides the complete range of Maric valve body styles, materials, and custom flow configurations:

Feature

Published Manufacturer Specifications

Body Materials

Brass, Chrome-plated Brass, Gunmetal, 316 Stainless Steel, and PVC

Configurations

Screwed (F&F, M&F, F&M), Wafer (Table D, Table E, ANSI 150/300), Check Valve Combos

Hydrostatic Test

Tested up to 6,000 kPa

Temperature Range

0°C to 60°C (Nitrile), up to 100°C (EPDM), up to 200°C (Viton)

Ready to Lock In Your Flow Rate?

Let the engineering team at Coastal Reliability help you specify the exact Maric Flow Control Valve for your system.




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