RP31-Dual Gauge Pressure Regulator Custom

RP31-Dual Gauge Pressure Regulator

Application

Designed for the aquarium market, featuring an external pressure relief valve, solenoid valve, needle valve, and bubble counter. Compatible with US, EU, JP, and CN CO2 cylinder inlets.

Key Features

Integrated a pull-ring safety valve.
Dual gauges – For clear pressure monitoring.
High bubble accuracy – Error of less than ±2 bubbles per minute.

RP31-with manifold extensions
RP31-with regular needle valve
Product Images & Specifications
      • RP31-Dual Gauge Pressure Regulator
      Material Aluminum
      Medium CO2
      Operating Temperature ‑5℃~43
      Max. Working Pressure 12Mpa
      Proof Pressure 30Mpa
      Output Pressure 0.300.60Mpa
      Output Pressure Accuracy ±0.02MPa
      Pressure Indication Y40 dual pressure gauges for inlet and outlet
      Indication Accuracy Class  (EN 837-1)
      Inlet Port W21.8-14 / W22-14 / CGA320 / G5/8 /  G3/4
      Outlet Port G1/8 / NPT1/8
      Relief Pressure(LP side) 0.8Mpa
      Solenoid Valve DC12V 3W,DC connector,IP65,Power Plug
      Power Plug CN/US/EU/UK/JP/KR/AU
      Bubble Counter Quick-insertable/Quick-turning
      Net Weight 802g
      (▲ marked parts are standard parameters available for customization.)
  • RP31-Dual Gauge Pressure Regulator
  • RP31-Dual Gauge Pressure Regulator
Ordering Code

* Ordering code = Model + "-"  + Outlet Pressure+"-"+Inlet+"-"+  Needle Valve & Bubble Counter+"-"Relief Mechanism

Example: RP31AU-075-W1-1-1

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Industry Knowledge

A dual gauge pressure regulator sits between a gas source and whatever it feeds — a grow room CO2 line, a welding torch, a beverage carbonation system — and its job is easy to underestimate. It steps down high, unpredictable supply pressure into a steady, usable output, and it lets the operator watch both sides of that transformation at the same time. That second dial is what separates a dual gauge gas regulator from a basic single-dial unit: instead of guessing how much gas is left in the tank, or trusting that the downstream pressure hasn't drifted, the operator reads inlet supply and regulated outlet pressure side by side, in real time. Across hydroponics, industrial gas handling, and general fluid control, that second reading turns a routine fitting into an actual monitoring point.

Reading Inlet and Outlet Pressure at a Glance

Most pressure-related downtime doesn't come from a sudden failure — it comes from finding out too late that a supply tank was nearly empty, or that downstream pressure had quietly crept up without anyone noticing. A single-gauge setup only ever tells half of that story. A Dual Gauge Pressure Regulator tells both halves at once, which is why it has become the default choice anywhere gas supply needs to be tracked as closely as gas delivery.

  • Inlet gauge — shows remaining pressure in the supply tank or line, so refills or swaps can be planned ahead of an empty-tank shutdown.
  • Outlet gauge — confirms the regulated delivery pressure actually reaching the equipment, catching drift before it affects the process.
Pressure Points Visible to the Operator Single-Gauge 1 reading (outlet only) Dual-Gauge 2 readings (inlet + outlet)
Typical outlet pressure ranges by application — for reference only, always check equipment requirements.
Application Typical Outlet Range Why Dual Gauge Helps
Hydroponic CO2 enrichment Low, steady flow Tank depletion tracked without opening the grow room
Inert gas welding Moderate flow Outlet drift caught before it affects weld quality
Beverage carbonation Low, constant pressure Consistent pour pressure across a shift

The difference shows up clearly when the two setups are compared side by side. A single-gauge regulator can be perfectly stable and still leave an operator guessing about supply; a dual-gauge unit closes that gap without changing anything else about how the regulator performs.

Single vs Dual Gauge — Practical Attributes Stability Visibility Response Speed Calibration Ease Durability

Precision Behind Every Reading

At Ningbo Noursun Industrial Co., Ltd, a dual gauge only earns its second dial if both gauges stay accurate over years of use — a loose seat, an inconsistent needle valve, or a poorly calibrated dial makes the second reading worthless. That's the reasoning behind adopting zero-defect management and integrated R&D-to-manufacturing, so that the transition from a design requirement to a finished, calibrated regulator stays seamless from demand all the way through to delivery, rather than treating design and production as two separate handoffs.

None of that happens on its own. It comes from building a talent symbiotic system that aligns individual skill and judgment on the production line with the company's own performance goals, so the people calibrating a regulator have a direct stake in getting it right the first time. Every product is crafted with that same care, which is what keeps a regulator's outlet reading trustworthy long after it leaves the factory.

Supply Depletes, Regulated Output Holds Steady Inlet (supply) pressure Regulated outlet pressure Time in use →

Smarter Production, Faster Delivery

When data drives equipment and algorithms predict demand, intelligent manufacturing starts redefining the logic of production itself. Equipment networks connected through the Internet of Things, tied together by an Industrial Internet efficiency layer, mean every step of building a Dual Gauge Gas Regulator — from raw brass and seal material to final gauge calibration — can carry a "smart gene" that makes it traceable.

What that traceability is aimed at

  1. Second-level traceability of raw materials, so a batch issue can be traced back to its exact source.
  2. Real-time early warnings for production anomalies, catching a calibration drift before parts leave the line.
  3. A meaningful reduction in order delivery cycles, targeted at 30%, from flexible line switching and digital-twin process simulation.

This isn't just equipment upgrading for its own sake — it's a different way of coordinating people, machines, and materials, aimed squarely at cost, quality, and delivery speed working together instead of trading off against each other.

Order Delivery Cycle — Target Before Target (-30%)

Common Questions About Dual Gauge Regulators

Do both gauges need to be checked every time the gas is turned on?

It's worth a quick glance at both, since it takes seconds and catches two different problems — a low inlet reading flags a tank that needs attention soon, while an outlet reading that's off from normal flags a regulator or downstream issue.

Why does the outlet reading sometimes drift even when the tank is full?

A full tank rules out supply as the cause, which narrows the problem to the regulator itself — usually a seat, spring, or calibration issue rather than anything on the gas source side.

Is a dual gauge regulator harder to install than a single-gauge one?

No — the second gauge adds a reading, not a step. Fitting, connection, and flow adjustment work the same way; the only difference is having a supply-side number to check alongside the delivery-side one.

How is manufacturing consistency kept across large production batches?

By integrating R&D, manufacturing, and service so that feedback from one stage reaches the others quickly. Ningbo Noursun Industrial Co., Ltd treats that integration as the foundation for continuing to improve, rather than something finished once a design is approved.