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Brand: Samson
Samson 2371 Hygienic Pressure Reducing Valve DN 15-50
Description
Samson 2371 hygienic pressure reducing valve: Type 2371-10 and 2371-11
The Samson 2371 series is a stainless steel pressure reducing valve designed for food, beverage and pharmaceutical plants. It is an angle-pattern diaphragm regulator with a body free of dead cavities, so it can be cleaned in place (CIP) and sterilised in place (SIP). Two actuators share the same hygienic body: the Type 2371-10 takes its set point from an external air signal, while the Type 2371-11 is adjusted by hand with a spring. Set points run from 0.4 to 6 bar (6 to 90 psi), with nominal sizes DN 15 to 50 or NPS ½ to 2 and a maximum inlet pressure of 10 bar. Seven Star LLC supplies the Samson 2371 in Oman and the GCC as an independent supplier based in Muscat.
The wetted surfaces are precision-machined to Ra 0.8 µm or better, the materials are FDA-compliant and the diaphragm complies with USP Class VI at 121 °C. A test connection allows leakage monitoring of the operating diaphragm, a feature that matters wherever process fluid and compressed air must not mix.
Decoding the Samson 2371-10 and 2371-11 types
- 2371 – the hygienic pressure reducing valve series.
- -10 – pneumatic set point adjustment; the set point pressure pc (maximum 8 bar) comes from an external compressed air supply.
- -11 – manual set point adjustment with a set point screw, tensioned with an 8 mm Allen key.
Beyond this, the ordering details are size, connection standard, surface finish, seal material and optional stem locking.
Samson 2371 technical specifications
| Parameter | Specification |
|---|---|
| Manufacturer / part number | Samson Type 2371-10 (pneumatic) and Type 2371-11 (manual) pressure reducing valves |
| Function | Outlet pressure reduction; valve closes as output pressure rises |
| Nominal size | DN 15 to 50 (DIN) or NPS ½ to 2 (ANSI) |
| Set point range | 0.4 to 6 bar / 6 to 90 psi; 2371-11 ranges 0.4–1.2, 1–3, 2.5–4.5, 4–6 bar; 2371-10 0.5–6 bar (2.5–6 bar for KVS 16) |
| Max. operating (inlet) pressure | 10 bar / 150 psi |
| Operating temperature | 0 to 160 °C (32 to 320 °F); sterilisation 180 °C for up to 30 minutes |
| KVS / CV | 2371-10: KVS 10 or 16 (CV 12 or 20); 2371-11: KVS 0.63 (soft seat), 1.0, 2, 3.5, 5.2 (CV 0.75, 1.2, 2.5, 4, 6) |
| Leakage class | Metal seat: Class I (≤0.05 % of KVS/CV); soft seat: Class IV (≤0.01 %) |
| Body and cover | 2371-10: 1.4409 / CF3M; 2371-11: 1.4404 / 316L |
| Plug | 1.4404 / 316L metal seat; EPDM soft seal optional |
| Diaphragm | PTFE-coated EPDM, USP Class VI-121 °C |
| Surface finish | Inside Ra ≤0.8 µm standard; Ra ≤0.6 polished, Ra ≤0.4 satin or mirror optional; outside glass bead blasted |
| Pneumatic connections | Set point pressure G ¼ (2371-10); CIP connection G 1/8 |
How the 2371 reduces and holds outlet pressure
Medium enters the angle body from below, passes between plug and seat and leaves from the side. The valve is open when idle and closes when the outlet pressure p2 pushes on the diaphragm harder than the set point force. Outlet pressure therefore depends on the flow, as for any proportional regulator.
In the manual type the force comes from springs. Turning the set point screw clockwise raises spring tension and the pressure setting, and turning it anticlockwise lowers it. A locking screw prevents vibration from changing the setting. In the pneumatic type a compressed air signal (pc, up to 8 bar) replaces the springs; the ratio between pc and the outlet pressure is not necessarily one to one, so calibrate on site. Two diaphragms in that version give an extra barrier if one ruptures, and any leaking medium escapes through the test bore where it can be seen.
CIP and SIP with the 2371: stem locking
Both actuators can be fitted with a stem lock that holds the plug in the open position, so cleaning and sterilising media flow through the full seat area. The lock is pneumatic for both types (pV 1 bar on the -10, 6 bar on the -11), and the manual type additionally offers a manual pin that screws in place of the blanking plug. Control action returns when the lock is released, since the spring pulls the actuating unit back.
Connections and surface finishes
- Threaded: DIN 11864-1 form A series A, B, C; DIN 11887; ISO 2853 (IDF); SMS 1146
- Clamp: DIN 11864-3 form A series A, B, C; DIN 32676; ISO 2852; BS 4825 part 3; ASME BPE
- Flange: DIN 11864-2 form A series A, B, C
- Special versions: DIN EN 1092-1 B2 and ASME B16.5 Class 150 flanges, DN 50 body with DN 65 connections, body and plug in 1.4435, pure PEEK plug seal
Where the 2371 fits and related Samson regulators
This regulator is the hygienic member of the Samson self-operated range. For general industrial reducing duty, the Series 44 regulators (44-0B, 44-1B, 44-2) use cast or machined bodies with bellows or diaphragm actuators, while Type 2406 handles excess pressure on gases. Because it needs a pressure drop and a clean supply, use a strainer or sterile filter upstream where particles or biofilm could reach the seat.
Selection and ordering checklist for the 2371
- Choose pneumatic or manual set point adjustment.
- Define the outlet set point and check it fits one of the available ranges.
- Give the maximum flow and pressure drop; read KVS or CV against the data sheet.
- Choose size, connection standard and surface finish (polished or mirror for pharma).
- Decide on metal or soft seat, plus PEEK or other special seals.
- Ask for stem locking when CIP or SIP is part of the plant cycle.
Installation, commissioning and maintenance
Mount the regulator free of pipe stress with the actuator on top, the axis vertical, the inlet at the bottom and the outlet to the side, following the flow arrow. Route the test connection discharge to a visible place. Commission the manual type by removing the blanking plug and adjusting the set point screw with the Allen key; for the pneumatic type, set the control air pressure while checking outlet pressure on a gauge.
Inspect diaphragms during planned stops, as hygienic duty with repeated steam cycles ages elastomers. Keep spare diaphragms and plug seals matched to the original materials, and record the serial number so the right parts are supplied.
Typical applications in Oman and the GCC
Pharmaceutical plants, dairies, juice and beverage lines, water treatment skids and cleanroom utilities in the region need a hygienic regulator for steam, process water and clean gases. High ambient temperatures and frequent CIP cycles favour a stainless steel body without dead pockets, and the stem lock reduces cleaning time.
Information to send with an RFQ for the 2371
- Medium, temperature, CIP/SIP parameters
- Inlet pressure, outlet set point, and flow
- Size, connection standard and surface finish
- Pneumatic or manual set point, stem lock requirement
- Seal materials, project tag number and delivery location
Documents and quotation
A Samson datasheet for the Type 2371-10 and 2371-11 is attached on this page, with the full connection tables and materials.
Send your duty and Seven Star LLC will quote the Samson 2371 for delivery in Oman and the GCC.
Other Models in the Samson Self Operated Regulators Range
Seven Star LLC supplies models from the Samson Self Operated Regulators range in Oman and the GCC. Compare the related models below and request a quote for the one that matches your application.
| Model | Category | |
|---|---|---|
| Samson Type 41-23 Universal Pressure Reducing Valve | Regulators | View details |
| Samson 2406 Excess Pressure Valve DN 15-50 PN 16-40 | Regulators | View details |
| Samson 2371 Hygienic Pressure Reducing Valve DN 15-50 | Regulators | You are viewing this model |
Datasheets & Documents
- Datasheet Samson 2371 Datasheet Download
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About brand
SAMSON is a German manufacturer of control valves, actuators, positioners and self-operated regulators. Hermann Sandvoss founded the company in Düsseldorf on 1 April 1907, and its first important product was a thermostatic valve that controlled temperature without external power. After moves to Mannheim, SAMSON settled in Frankfurt am Main in 1916, where SAMSON AG is still headquartered.
Seven Star LLC supplies Samson control valves, pneumatic actuators and positioners to process plants in Oman, including the types listed on this page and their replacement units.
Samson company profile
| Founded | 1 April 1907, Düsseldorf, by Hermann Sandvoss, as VULCAN Technische Apparate Baugesellschaft; products sold under the SAMSON name |
|---|---|
| Headquarters | Frankfurt am Main, Germany, since 1916 |
| Legal form | SAMSON AG |
| First product | A self-operated thermostatic valve |
| Group brands | SAMSON together with PFEIFFER, LEUSCH, VETEC and AIR TORQUE |
| Product families | Globe valves such as Type 3241, rotary and butterfly valves, 3271 and 3277 pneumatic actuators, 3730 and 3731 positioners, self-operated pressure and temperature regulators |
Milestones
- 1907: Hermann Sandvoss founds the company in Düsseldorf.
- 1909: It is re-established as SAMSON Apparatebau GmbH.
- 1916: After a period in Mannheim, the company moves to Frankfurt am Main.
- 1975: The name becomes SAMSON Mess- und Regeltechnik.
Samson valve, actuator and positioner types
Samson builds a control valve from modules. The Type 3241 globe valve is the general-service body of Series 240, and the Type 3251 is the Series 250 body for higher pressure ratings. Either one is combined with a Type 3271 pneumatic diaphragm actuator or a Type 3277, whose yoke allows the positioner to be attached directly with a concealed travel linkage.
Among the positioners listed are the Type 3725 and the Type 3730 family: the 3730-1 as the basic electropneumatic version, sold in its current generation as TROVIS 3730-1, and the 3730-3 with HART communication and valve diagnostics. Samson also makes PROFIBUS PA and FOUNDATION fieldbus variants in the same family, plus self-operated pressure and temperature regulators.
Where Samson valves are used
Samson control valves throttle steam, gas and liquids in chemical and petrochemical units, refineries, gas processing, power stations, water and desalination plants, and food production. Many reach site as part of a skid or package, so the plant instrument team often meets them first when a positioner or actuator needs replacing. We supply these items to end users and contractors throughout the GCC.
Samson products we list
Ordering Samson parts: what we need
Every Samson device has a nameplate with the type, a configuration ID (Var-ID) and a serial number. A photo of that plate is the surest route to an exact match. Without it, please send:
- Valve: type, DN or NPS, pressure rating, body and trim material, Kvs or Cv, plug and seat style, packing and bonnet type
- Actuator: type, effective area in cm², bench range, fail action and travel
- Positioner: full type code including Ex protection, communication and options such as limit switches or position transmitter
We check the code against Samson documentation and provide the manufacturer's data sheet on request.
Facts checked against SAMSON's corporate chronicle and press material, October 2026.
Browse Samson products by category: Control Valves, Valve Positioner, Valve Actuator.
FAQ
Questions about the Samson 2371 Hygienic Pressure Reducing Valve DN
Answers from our engineering team on installation, compatibility and integration.
01What is the difference between the 2371-10 and 2371-11?
The 2371-10 takes its set point from an external compressed air signal (pc up to 8 bar). The 2371-11 uses springs, and the set point is adjusted by screw with an 8 mm Allen key.
02Can the 2371 be cleaned and sterilised in place?
Yes. The body is free of dead cavities, sterilisation up to 180 °C for 30 minutes is allowed, and an optional stem lock keeps the plug open during CIP or SIP.
03Which materials and finish does it use?
Body and plug in stainless steel 1.4404/316L (cast 1.4409/CF3M on the 2371-10 body), a PTFE-coated EPDM diaphragm and inside surfaces of Ra 0.8 µm or better. Polished and mirror finishes are optional.
04What is the maximum inlet pressure?
The maximum operating pressure at the inlet is 10 bar (150 psi). The valve reduces to set points between 0.4 and 6 bar (6 to 90 psi).
05How is diaphragm leakage detected?
Through a test connection. Medium escaping from it indicates that the operating diaphragm may be leaking or ruptured, and on the pneumatic type it is routed through a flexible pipe elbow.
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