Pressure reducing valve DRV 250 G 3/8" for water, air and gas, 0.2-2 bar, inlet 25 bar
Code: DRV250-38
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Product detailed description
The DRV250-38 pressure reducing valve reduces the pressure of water, compressed air or a neutral gas from an industrial network – up to 25 bar – to an adjustable 0.2 to 2 bar and keeps it constant. It is a diaphragm valve made of gunmetal with a pressure gauge included.
It belongs to the series of DRV pressure reducing valves by the manufacturer Berluto – DRV 250 is the low-pressure version. The valve is for industrial networks: it is not approved for drinking water and is not for steam or flammable gases.
Specifications
| Parameter | Value |
|---|---|
| Code | DRV250-38 |
| Manufacturer | Berluto, DRV 250 |
| Connection | G 3/8" female thread (ISO 228) |
| Control range | 0.2–2 bar |
| Inlet pressure | max. 25 bar |
| Maximum reduction ratio | 20 : 1 |
| Minimum pressure difference | 1 bar |
| kvs (water) | 0.6 m³/h = 10 l/min at a pressure drop of 1 bar |
| Pressure gauge | ⌀ 50 mm, 0–2.5 bar, included |
| Pressure gauge connection | G 1/4" on both sides of the body |
| Control | diaphragm |
| Secondary venting | no |
| Medium | water and neutral non-sticky liquids, compressed air, nitrogen, neutral non-flammable gases; not steam, not drinking water |
| Operating temperature | −15 to +100 °C, with pressure gauge max. +60 °C |
| Material | body gunmetal CC499K, spring housing gunmetal, diaphragm and seals NBR/CR |
| Dimensions | L 70 mm, H1 47 mm, H2 187 mm |
| Mounting position | any, preferably vertical |
| Conformity | Directive 2014/68/EU |
| Weight | 1.0 kg |
How much the valve lets through
A kvs value of 0.6 m³/h means that 10 l/min of water flows through the fully open valve at a pressure drop of 1 bar. At a different pressure drop Δp, Q = kvs × √Δp applies – at a pressure drop of 4 bar, this is about 20 l/min. For water, the manufacturer assumes lower flow rates; choose with a reserve.
The manufacturer does not specify a flow rate for compressed air – the kvs value is given for water. You will find a formula for an approximate conversion to air in the questions in the category of DRV pressure reducing valves; during control, the actual flow rate is lower than with a fully open valve.
Dimensions
Length between the connection faces 70 mm, pipe axis 47 mm above the base, overall height including the adjusting head 187 mm.
Installation and adjustment
- connect the valve according to the arrow on the body; any mounting position is possible, the manufacturer recommends vertical
- flush or blow out the pipework before installation – dirt will damage the valve seat
- you can move the pressure gauge to the other side of the body – the G 1/4" connection is on both sides
- set the pressure with the adjusting head while a small amount is being drawn off, then check it on the pressure gauge
- the internal parts are replaceable – for worn seals, there is a seal kit for each version and size
Seal kit and other sizes
- seal kit for this valve: DRV250-38REP
- same size G 3/8", different range: DRV200-38
- same size G 3/8", different range: DRV225-38
For compressed air with secondary venting and high flow rates, there are air pressure regulators.
Additional parameters
| Category: | DRV pressure reducing valves for water, air and gases up to 40 bar |
|---|---|
| EAN: | 4050571274269 |
| Pressure: | 25 bar |
| Dimensions: | 70 × 187 mm |
| Weight: | 1.0 kg |
| Material: | Bronze |
| Medium: | Compressed air, Water, Nitrogen |
| Working temperature: | -15 / +60 °C |
| Regulatory range: | 0.2 to 2 bar |
| Product type: | Pressure regulator |
| Thread: | G 3/8" |
| Regulator type: | Manually adjusted |
| Outlet pressure: | 0.1–1 bar, 1–3 bar |
| Pressure gauge included: | Yes |
Product rating
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Berluto Armaturen-Gesellschaft mbH is a German valve manufacturer with its headquarters and production in Tönisvorst.
From the Berluto brand, we offer DRV pressure reducing valves made of gunmetal for industrial water, compressed air and neutral gas networks. Three versions cover outlet pressures of 0.2 to 20 bar and inlets of up to 40 bar, eight sizes threads from G 1/4" to G 2". There is a seal kit for every valve.
Water, air, gasesBerluto pressure reducing valves
DRV 250 low-pressure
0.2–2 bar. For low outlet pressure, inlet up to 25 bar.
- reduction ratio up to 20 : 1
- pressure gauge 0–2.5 bar
- G 1/4" to G 2"
DRV 200 standard
1.5–8 bar. The most common version for networks up to 25 bar.
- reduction ratio up to 10 : 1
- pressure gauge 0–10 bar
- G 1/4" to G 2"
DRV 225 high-pressure
1.5–20 bar. Piston valve for networks up to 40 bar.
- reduction ratio up to 6 : 1
- pressure gauge 0–25 bar
- G 1/4" to G 2"
Not sure which version and size to choose? In the category you will find a selection by pressure and flow rate as well as a worked example.
All DRV valvesBerluto pressure reducing valves at a glance
| Gunmetal DRV pressure reducing valves | ||||
|---|---|---|---|---|
| Version | Inlet pressure | Outlet pressure | Control | Sizes |
| DRV 250 | 25 bar | 0.2–2 bar | diaphragm | G 1/4" to G 2" |
| DRV 200 | 25 bar | 1.5–8 bar | diaphragm | G 1/4" to G 2" |
| DRV 225 | 40 bar | 1.5–20 bar | piston | G 1/4" to G 2" |
kvs 0.5 to 7.2 m³/h depending on size (water), minimum difference between inlet and outlet pressure 1 bar, pressure gauge included. Not for drinking water, steam or flammable gases.
How to choose a Berluto pressure reducing valve
1. Outlet pressure
Up to 2 bar DRV 250, up to 8 bar DRV 200, up to 20 bar DRV 225.
2. Inlet pressure
DRV 200 and 250 withstand 25 bar, DRV 225 40 bar. The inlet must be at least 1 bar higher than the outlet.
3. Flow rate
Choose the size according to the kvs value: water Q = kvs × √Δp. For air, there is an approximate formula in the category.
4. Installation
According to the arrow on the body, preferably vertical. The pressure gauge can be moved to the other side of the body.
Frequently asked questions
- Are Berluto valves suitable for drinking water?
- No. The manufacturer does not state approval for drinking water – DRV valves are for industrial water, air and neutral gas networks.
- Can the valves be repaired?
- Yes, the internal parts are replaceable. There is a seal kit for every version and size.
- Do the valves comply with the Pressure Equipment Directive?
- Yes, the manufacturer states conformity with Directive 2014/68/EU.
Technical data according to the data sheets of the manufacturer Berluto Armaturen-Gesellschaft mbH (Tönisvorst, Germany).
| Manufacturing company : | Berluto Armaturen-Gesellschaft mbH |
|---|---|
| Address : | Tempelsweg 16, 47918 Tönisvorst, Germany |
| E-mail : | verkauf@berluto.de |