Brand: Samson

SAMSON Type 3248 Cryogenic Control Valve DN 25-150

Name: SAMSON Type 3248 Cryogenic Valve | Oman
Brand: Samson
SKU: 3248

Description

SAMSON Type 3248 cryogenic valve: globe and angle control for very cold service

The SAMSON Type 3248 is a cryogenic control valve from Series 240, designed for liquefied gases such as nitrogen, oxygen, argon and LNG-type duties. It is offered as a globe or angle valve, and its top-entry construction lets the seat, plug and bellows be reached through the cryogenic extension bonnet once the actuator is removed, without cutting the valve out of the line. Seven Star LLC supplies Type 3248 valves in Oman and the GCC as an independent supplier in Muscat.

The suffix after 3248 describes the actuator on the valve:

Type 3248-1: with a Type 3271 pneumatic actuator, 175v2 to 2800 cm² actuator area.
Type 3248-7: with a Type 3277 pneumatic actuator, 175v2 to 750v2 cm², for integral positioner attachment.

This is the DIN version (DN 25 to 150). An ANSI version of the cryogenic valve is covered by a separate SAMSON datasheet.

Type 3248 technical specifications

Parameter	Specification
Manufacturer / part number	SAMSON Type 3248 (3248-1 with Type 3271, 3248-7 with Type 3277 actuator)
Body style	Globe valve or angle valve, top entry
Nominal size	DN 25 to 150
Pressure rating	Globe: PN 16 to 100; angle in steel: PN 16 to 100; angle in aluminum: PN 16 to 40
Temperature range	−196 to +65 °C; down to −273 °C on request; above +65 °C on request
End connections	Welding ends to DIN EN 12627 (steel); ISO 9692-3 (aluminum body)
Body material	Steel 1.4308 or aluminum EN AW-5083 (angle valve)
Seat and plug	CrNiMo steel; Stellite facing or solid Stellite plug up to seat bore 48
Seat-plug seal	Metal seal, soft seal (PTFE with glass fiber) or high-performance metal seal
Leakage class (DIN EN 60534-4)	Metal seal IV, soft seal VI, high-performance metal seal V
Characteristic	Equal percentage or linear
Rangeability	50:1 up to DN 50; 30:1 for DN 80 to 150
Stem seal	Metal bellows plus self-adjusting V-ring packing (pure PTFE or PTFE/carbon)
KVS range	0.1 to 260 (seat bores 3 to 130 mm)
Travel	15 mm up to KVS 80; 30 mm for KVS 63 to 260

Design and principle of the Type 3248

The medium flows in the direction of the arrow on the body, and the position of the plug relative to the seat sets the flow. The plug stem is fitted with a metal bellows so the process fluid never reaches the V-ring packing, which seals the stem to atmosphere and adjusts itself. Heat leakage into the cold line is kept small by the long cryogenic extension bonnet together with the bellows, which keeps the warm actuator and the packing far from the cold section. A test connection closed by a screw plug allows the stem seal to be checked for leakage at any time.

A cover plate on the extension bonnet allows installation in vacuum-insulated pipelines, air separation plants and associated plant. Optional RFID tags follow DIN SPEC 91406 for unique identification, and a safety manual is available for SIL-related systems.

Where the Type 3248 fits and related parts

The Type 3248 belongs to the SAMSON Series 240 family. Typical neighbours on a cryogenic project are the Type 3271 and Type 3277 pneumatic actuators, positioners and limit switches fitted to the IEC 60534-6-1 and NAMUR interface, and supply pressure regulators. For different duties, SAMSON also offers the Type 3351 on/off valve in the same series, and the Type 3510 micro-flow valve for very small flows. Only the Type 3248 is designed with the extension bonnet and bellows for temperatures down to −196 °C and below.

Type 3248 versions and dimensions

Face-to-face length L and weight without actuator for the stainless steel globe valve, PN 16 to 40:

Nominal size	Length L (mm)	Weight (kg)
DN 25	210	17
DN 40	251	30
DN 50	286	30
DN 80	337	55
DN 100	394	96
DN 150	508	131

The angle valve is shorter in face-to-face length (98 mm at DN 25 up to 236 mm at DN 150). The datasheet lists reference heights H1 of roughly 0.8 to 1.3 m (exact value depends on the actuator and configuration) and gives a service clearance height H7 of 900 to 1100 mm, so check headroom in insulated cold boxes.

Selection and ordering checklist for the Type 3248

Fluid, minimum operating temperature (to −196 °C standard, −273 °C on request) and whether oxygen service needs an oil- and grease-free version.
Required KVS from the IEC 60534 calculation; select DN and seat bore from the KVS table.
Pressure rating PN 16 to 100 and body style (globe or angle, steel or aluminum angle body).
Seat-plug seal and tightness: metal (IV), soft (VI) or high-performance metal (V).
Fail-safe action: fail-close (actuator stem extends) or fail-open (stem retracts).
Mounting angle: SAMSON recommends 15 to 25° to the horizontal; smaller angles need extra measures.
Accessories: positioner, supply pressure regulator, handwheel, limit switch, vacuum jacketing.

Installation, commissioning and maintenance

Avoid supporting the pipe or bracket near the bellows nut. Keep the specified service clearance above the actuator so the extension bonnet assembly can be lifted out. After removal of the actuator, the bellows, plug and seat can be inspected through the top. Check the test connection during commissioning and at scheduled stops, and keep spare soft-seal rings and packing in stock for critical air separation units.

Typical applications in Oman and the GCC

Cryogenic control is used wherever liquefied gases are produced, stored or regasified: industrial gas plants, LNG terminals and small-scale LNG, ammonia and fertilizer facilities, and nitrogen or oxygen systems serving refineries and steel-related industry. In hot, dusty coastal conditions the main concerns are insulation integrity, humidity ingress on cold spots and clean instrument air for the actuator.

Information to send with an RFQ for the Type 3248

Type 3248-1 or 3248-7, DN, PN class, and globe or angle body.
Fluid, flow, inlet and outlet pressure, and operating temperature range.
Leakage class, oxygen cleanliness and material requirements.
Positioner and accessories, fail-safe position, and project specification.

Documents and quotation

The SAMSON T 8093 datasheet for the Type 3248 is attached on this page, with the KVS tables, materials and dimensions for all body styles.

Send the Type 3248 details and process data and Seven Star LLC will quote supply to Oman and the GCC.

Datasheets & Documents

Datasheet SAMSON Type 3248 Datasheet T 8093 Download

Reviews (0)

Reviews

There are no reviews yet.

How would you rate this product?

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

Family	Examples
Valve Positioners	3730-3 Electropneumatic Smart Positioner, TROVIS 3730-1 Electropneumatic Positioner, Type 3725 Electropneumatic Positioner, Type 3767 Electropneumatic Positioner, Type 4763 Electropneumatic Positioner
Control Valves	Type 3241 Globe Control Valve, Type 3244 Three-Way Control Valve, Type 3251 Globe Control Valve, Type 3310 Segmented Ball Control Valve
Valve Actuators	Type 3271 Pneumatic Diaphragm Actuator, Type 3277 Pneumatic Actuator for Integra…, Type 3374 Electric Linear Actuator
Solenoid Valves	Type 3963 Solenoid Valve for Pneumatic A…

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 Type 3248 Cryogenic Control Valve DN 25-150

Answers from our engineering team on installation, compatibility and integration.

01What temperature range does the Type 3248 cover?

The standard version covers −196 to +65 °C. Operation down to −273 °C is available on request, as are temperatures above +65 °C.

02How does the Type 3248 limit heat leakage?

It uses a cryogenic extension bonnet combined with a metal bellows. The long extension keeps the warm actuator and packing away from the cold section.

03Can the Type 3248 be serviced without removing it from the pipeline?

Yes. The top-entry design gives access to the seat, plug and bellows through the cryogenic extension bonnet after the actuator is removed.

04What leakage classes are available for the Type 3248?

Under DIN EN 60534-4, a metal seal gives class IV, a soft seal with PTFE and glass fiber gives class VI, and a high-performance metal seal gives class V.

05What is the difference between Type 3248-1 and Type 3248-7?

Both share the Type 3248 body. The -1 version has a Type 3271 actuator (175v2 to 2800 cm²); the -7 version has a Type 3277 actuator (175v2 to 750v2 cm²) with integral positioner attachment.