Hiwi Double stage Pressure regulator + SV & CV

(9 ratings)

Can be used in combination with returnable cylinders
Suitable for use with inline atomizers
Constant CO₂ supply until the bottle is empty
Solenoid valve and check valve are screwed tight
Facilitates precise adjustments to the CO₂ supply

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Description

This high-quality pressure regulator is used to reduce the pressure of approx. 54 bar within the gas cylinder to a working pressure of approx. 1 to 3 bar (maximum working pressure 3 bar). By combining the working pressure manometer and the cylinder pressure manometer you can regulate the CO₂ supply very precisely and you know at once when it is time to refill the cylinder. The integrated fine needle valve allows a very precise regulation of the CO₂ supply for the aquarium. Thanks to the double chamber system, the working pressure remains constant until the cylinder is completely empty.

When pressure regulators without a double chamber system are used the working pressure may rise relatively fast and abruptly as soon as the gas filling inside the bottle goes below around 20% of the nominal filling quantity. If you do not re-adjust manually in such a case, the amount of CO₂ supplied to the tank will increase significantly and surmount the dosage that was originally set. If you do not want to take on this task, the remaining 20% of CO₂ would need constant adjustements of the working pressure.

With this double-chamber pressure regulator, on the other hand, the cylinder can be emptied almost entirely without the need to adjust the working pressure for the last 20% of CO₂, which is of advantage especially when you use large CO₂ cylinders. In a 10 kg cylinder, e.g., around 2 kg of CO₂ would need constant adjustments regarding the working pressure.

Please keep in mind that the manufacturer has glued in all components. Thus they can not be removed without damage. If one or several components are removed, the manufacturer's liability will expire prematurely.

This pressure regulator from Hiwi is also available without solenoid valve (SV) and check valve (CV): Hiwi Double Stage Pressure Regulator

The Hiwi Double Stage Pressure Regulator is also available with one pressure chamber, a fixed solenoid valve (SV) for night shut-off and with a ceck valve (CV): Hiwi Pressure regulator + SV & CV

Manual (in German Language) - - download PDF

Features

The pressure regulator is designed for returnable cylinders
Thread: W21,8 x 14G
Seal included
The thread is made according to UK, Europe, Japan and Taiwan standard (BS341 / DIN477 / W21.8)
The connection for the CO₂ tubing is equipped with a metric thread (M6)
High-quality solenoid valve with low energy consumption. The solenoid valve is firmly attached to the pressure regulator.
1,5 m power supply cord with German plug
Power supply: 230 V AC; 50/60 Hz; 1,6 VA open
Closed when without current
100 % ED (suitable for continuous operation)
Permissible temperature: -30 - 130 ºC
Max. ambient temperature: 40 ºC
Protection class IP65 (dust-proof and protected against jets of water)
Insulation class F (155 °C) screwed to plug
Max. pressure difference: 16 bar
A check valve secures the entire CO₂ supplying system. It is firmly connected with the solenoid valve and the pressure regulator
With German instructions of use

Application

Please use the pressure reducer only after reading the operating instructions, which are linked above.

Make sure that you really start the pressure reducer with a CO₂ bottle.
Turn the working pressure adjustment screw (operating instructions 4) counterclockwise.
Close the fine needle valve (operating manual 5) by turning it clockwise. CAUTION: Tighten only slightly!
Position the pressure reducer so that the pressure gauges are facing upwards.
Fasten and tighten the pressure reducer to the CO₂ cylinder using the union nut (operating instructions 7).
It is essential to ensure that the seal is correctly seated and that the sealing surfaces are clean. If the seal is is damaged or lost, please replace it.

Dimensions

Hiwi Double stage Pressure regulator + SV & CV
Width	210 mm
Height	170 mm
Depth	100 mm
Meas. from connection	155 mm

Hiwi

Hiwi is a renowned German manufacturer of CO₂ pressure regulators. The highest level of quality and a long useful life are in their focus. These high quality standards do not exclude attractive prices, though.

Especially in aquascaping, the addition of CO₂ for the plants is something very basic, and thus it is really important to choose good CO₂ supplying equipment. Hiwi meets even the highest quality standards in every aspect und is thus the best choice when it comes to CO₂ pressure regulators.