Brand: Danfoss

Danfoss 148H3402 ORV 40 Oil Temperature Regulating Valve, 40 mm

Name: Danfoss 148H3402 ORV 40 Oil Temperature Valve | Seven Star
Brand: Danfoss
SKU: 148H3402

Description

ORV 40: a three-way oil temperature regulating valve for compressor oil cooling

The 148H3402 is a Danfoss ORV 40 oil regulating valve, a three-way thermostatic valve that controls the temperature of compressor oil. It has three 40 mm (1 1/2 in) butt-weld connections to EN 10220 marked A, B and C, a steel body and an H2 valve housing. The Kv value is 30 m3/h and the net weight is 8 kg.

The maximum working pressure is 40 bar (580 psig), approvals are CE, CRN and UA, and the page lists ORV accessories and ORV spare parts. The body is painted reddish brown.

Technical specifications

Parameter	Specification
Danfoss code number	148H3402
Type	ORV 40
Approvals as listed	CE; CRN; UA
Connection size	1 1/2 in / 40 mm
Connection standard	EN 10220
Connection type	Butt weld
Inlet connection size	40 mm
Kv value	30 m3/h
Maximum working pressure	40 bar
Refrigerants	R134a; R170; R22; R290; R401A; R402A; R404A; R407A; R407B; R407C; and others listed in the data sheet
Valve housing type	H2
Net weight	8 kg
EAN	5702428229807

Oil temperature control with a three-way valve

Screw compressors need the oil kept inside a temperature window, warm enough to avoid dilution by refrigerant and cool enough to maintain viscosity. A three-way valve like the ORV mixes the flow through an oil cooler and the bypass line according to the oil temperature, so the oil leaves at the set temperature without electronics.

The ORV data sheet (Temperature regulating valve, type ORV) gives the connection layout, the thermostatic elements and the temperature ranges available; the element is ordered separately from the valve housing, so choose the setting range and the housing together.

Piping and ordering checks

Mark the ports: A, B and C are embossed on the body, so check the mixing and diverting orientation in the installation guide before you weld. Weld the housing with the element removed and flush the oil circuit afterwards to remove scale.

Confirm the element temperature range, the connection size and the oil circuit pressure before ordering; the ORV is not rated for refrigerant pressures above 40 bar. Check that it matches your compressor skid layout. The housing, the thermostatic element and the connection ports are separate considerations: the product page lists ORV accessories and spare parts, so seals and elements can be replaced later without changing the valve body in the pipe.

Other types and sizes from the same Danfoss family that appear in the Danfoss store listing include ORV 80 (148H3362), ORV 25 (148H3399), ORV 50 (148H3406), ORV 65 (148H3409). These are listed for orientation only; each has its own datasheet values, so check size, connection and version before ordering.

Documents and quotation

The attached file is the Danfoss Temperature regulating valve, type ORV AI176286419819en-001101 (manufacturer, unaltered). It is the manufacturer’s own PDF, hosted here unaltered. Related items sit under regulators. Seven Star LLC is an independent supplier in Muscat; send the code 148H3402 with the quantity and we will quote.

Datasheets & Documents

Datasheet Danfoss Temperature regulating valve, type ORV AI176286419819en-001101 (manufacturer, unaltered) Download

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About brand

Danfoss is the Danish engineering group that makes refrigeration and air-conditioning controls, heating components, variable speed drives and mobile hydraulics. Mads Clausen founded it on 1 September 1933 at his parents' farm in Nordborg on the island of Als, after making his first refrigeration expansion valve in 1932. Nordborg is still the group's headquarters, and Danfoss remains controlled by the Clausen family through the Bitten & Mads Clausen Foundation.

Danfoss company profile

Founded	1 September 1933, Nordborg, Denmark, by Mads Clausen (1905–1966)
First product	Thermostatic expansion valve for refrigeration
Headquarters	Nordborg, Denmark
Ownership	Private; majority controlled by the Bitten & Mads Clausen Foundation and the Clausen family
Size	About 42,000 employees (2023)
Business segments	Danfoss Climate Solutions (refrigeration, air conditioning and heating), Danfoss Drives (VLT and VACON frequency converters, soft starters), Danfoss Power Solutions (mobile and industrial hydraulics)
Brands in the group	VLT, VACON, Eaton Hydraulics (bought 2021), Ikusi radio remote controls

Milestones

1932–1933: First expansion valve; the company is founded in Nordborg.
1939: 26 employees. By the 10th anniversary in 1943 the company has 179.
1950s: Rapid growth turns Nordborg into a Danfoss town with housing and schools for its workforce.
1968: Danfoss launches its VLT frequency converter, one of the first mass-produced AC drives.
2014: Acquisition of the Finnish drives maker Vacon, now the VACON brand.
2021: Acquisition of Eaton's hydraulics business.

Choosing Danfoss products

For solenoid valves, check the operating principle. A direct-operated valve such as EV210B opens even at 0 bar differential pressure. A servo-operated valve such as EV220B needs a minimum differential (typically about 0.3 bar) to open, while an assisted-lift valve such as EV250B works from 0 bar. Coils are ordered separately, so the voltage on the coil (for example 230 V AC or 24 V DC) must match the control circuit. For drives, the VLT family is split by application: FC 51 Micro Drive for small machines, FC 102 HVAC Drive for fans and pumps in buildings, FC 202 AQUA Drive for water, and FC 302 AutomationDrive for demanding industrial duty.

Where Danfoss products are used

In Oman and the GCC, Danfoss drives run pumps, fans and compressors in district cooling plants, water and wastewater stations, desalination and building HVAC. Danfoss pressure switches, transmitters and solenoid valves are built into chillers, refrigeration plants, boilers and hydraulic systems, and AB-QM valves balance chilled-water circuits in large buildings.

Danfoss products we list

Family	Examples
Variable speed drives and soft starters	VLT Micro Drive FC 51, VLT HVAC Drive FC 102, VLT AQUA Drive FC 202, VLT AutomationDrive FC 302, FC 280, iC2-Micro, VACON NXP, MCD 600 soft starter
Solenoid valves and coils	EV220B, EV210B, EV250B, EV225B steam, EVR 25, AM230C coil
Pressure switches and thermostats	KP 37, KP 44, RT 200, CS, MBC 5000, KPS 77, RT 101
Pressure transmitters	MBS 3000, MBS 5100, MBS 3250, MBS 4251 Ex, AKS 33, DST P92S SIL 2
HVAC and refrigeration valves	AB-QM PICV, NovoCon S, AB-PM, AVTA, ICV, TE 5 element

Ordering Danfoss products: what we need

Send the Danfoss code number from the label (for example 032U7115 or 131B0149) or the full drive type code (FC-302P3K0T5...). For drives, add the motor power, supply voltage and any fieldbus option. For valves, add the size, connection, medium and coil voltage. For pressure switches and transmitters, add the range, output and pressure connection.

Facts checked against Danfoss's company history pages and published company data, October 2026.

Browse Danfoss products by category: AC Drives, Pressure Instrumentation, Control Valves, Solenoid Valve.