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Seetru Limited
Chemical Product Range

Chemical Product Range

Product catalog summary

Company Overview
Seetru Limited, founded in 1949, is a manufacturer of high-quality liquid level gauges and pressure relief devices. Known for its innovative Tutchtite® sealing system, the company ensures leak-free performance under high pressure and repeated use. Seetru's products are globally recognized and hold numerous international approvals.

Product Range
Seetru offers safety relief valves and specialized ancillary valves for applications such as compressed air, industrial gases, refrigerants, steam, and liquids. Their products comply with international standards like BS 6759, AD-Merkblatt A2, ISO 4126, and ASME Section VIII, and meet the European Pressure Equipment Directive 97/23/EC, with approvals including the CE mark, UV stamp, Russian GOST, and Canadian CRN.

Specialized Valves
The company provides valves for the compressed air industry and medium-sized industrial diesel engines, including minimum pressure valves for screw compressors and air starting valves for diesel engines.

Liquid Level Gauges
Seetru's liquid level gauges include sight gauges and magnetic float by-pass gauges, with options for electronic remote reading and computer interfaces. The range includes Quickmount, Seemag, CPI gauges for industrial applications, and Seeflex for marine applications.

Design and Development
Seetru has a robust design and development department with TÜV-approved testing facilities, offering bespoke design, advisory, and manufacturing services to tailor products for new applications.

Seetru 'CA' & 'CP' Range
The 'CA' and 'CP' range of safety valves for chemical applications feature compact designs and Tutchtite® sealing technology for reliable performance. These valves are manufactured to meet various international standards and are available with diverse sealing materials and manual relieving devices.

Technical Specifications

Temperature Range: -196°C to 250°C (dependent on seal material)
Flow Area: 78.54mm² for 10 mm inlet bore diameter
Pressure Range: 0.30 bar g. to 28.00 bar g.
Materials: Options include brass and stainless steel for various components.
Approvals: TÜV Germany, BS EN ISO 4126-1, PED 97/23/EC

Valve Specifications

GP 359: 5 mm nominal bore, PED approved, suitable for compressed air and gases.
GP 93610: 10 mm nominal bore, metal seal, PED and TÜV approved, suitable for compressed air and gases.
GP 93615: 15 mm nominal bore, metal seal, PED and TÜV approved, suitable for compressed air and gases.
GP 93620: 20 mm nominal bore, metal seal, PED and TÜV approved, suitable for compressed air and gases.
GP 93625: 25 mm nominal bore, metal seal, PED and TÜV approved, suitable for compressed air and gases.

Technical Details

Pressure Range: From 0.30 bar g. (4.35 psi g.) to 28.00 bar g. (406.00 psi g.) depending on the model.
Temperature Range: -196°C to 250°C, subject to seal material.
Flow Area: Varies by model, e.g., 314.16 mm² for GP 93620.
Connections: Inlet and outlet connections available in BSP, BSPT, and NPT standards.

Materials of Construction
The valves are constructed using materials such as brass and stainless steel, with specific components like the inlet seat, disc, and body made from these materials to ensure durability and safety.

Operational Notes

Maximum permissible built-up back pressure is 10% of set pressure.
Stable operation on flows down to 50% of valve rated capacity.
Relieving pressure is set pressure +10%.
Reseating pressure is set pressure -10%.

Approvals
The valves are approved by TÜV Germany and comply with standards such as BS EN ISO 4126-1 and PED 97/23/EC.

Graphical Data
Graphs illustrate discharge capacities for air and water at various pressures, providing visual guidance on valve performance.

Applications

These valves are suitable for use in the food industry, hygienic applications, and installations requiring clean service.
They are designed for economic operation with high discharge capacities and minimal leakage.

Seemag® Magnetic Gauge

A high-quality magnetic level indicator offering accurate step-less reading and all-round visibility.
Features include electronic high/low level alarms, remote digital reading, and heating systems for high viscosity liquids.

Contact Information
Seetru Limited, Albion Dockside Works, Bristol BS1 6UT, England. Tel: +44 (0)117 927 9204, Fax: +44 (0)117 929 8193, Email: [email protected], Web: www.seetru.co.uk

Catalog excerpts

Safety Relief Valves and Liquid Level Gauges Ver.1

Open the catalog to page 1

Seetru Limited Quality, Innovation & Service Seetru Limited was founded in 1949 with the aim of producing the nest liquid level gauges so customers could see the true level even under the most severe conditions. This philosophy of making the nest through innovation continued with the introduction of the Seetru range of pressure relief devices, circa 1950; the Seetru Tutchtite® sealing system revolutionized the safety valve market with valves that do not leak even after repeated popping and for high pressures. Today, Seetru have an extensive range of pressure relief valves and liquid level gauges...

Open the catalog to page 2

The Seetru range of safety valves for chemical applications are compact and highly efcient, designed with the exclusive Tutchtite® sealing technology offering repeatable bubble-tight sealing performance. Manufactured in accordance with a wide range of international standards and approvals such as TÜV (Germany) to AD Merkblatt A2, National Board UV Stamp to ASME Section VIII Division 1, GOST/RTN, and compliant with the requirements of the Pressure Equipment Directive 97/23/EC (CE marked). These valves are available with a wide range of sealing materials and technologies as well as a comprehensive...

Open the catalog to page 3

CP 94615 (Metal Seal) specications Inlet BSP & NPT Pressure range Temperature range -196°C to 250°C (subject to seal material) Flow area 176.71mm2 (15.00 mm inlet bore diameter) That's Safety! Notes 5 mm Nominal Bore Piped Discharge Safety Relief Valve 15 mm Nominal Bore Piped Discharge Safety Relief Valve • Maximum permissible built up back pressure is 10% of set pressure For Compressed Air & Gases SeetruLimited For Compressed Air & Gases SeetruLimited • Stable operation on ows down to 50% of valve rated capacity PED Approved • Relieving pressure is set pressure +10% (0.1 bar g. below 1.3 bar...

Open the catalog to page 4

CP 94620 (Metal Seal) specications Inlet BSP & NPT Pressure range Temperature range -196°C to 250°C (subject to seal material) Flow area 314.16mm2 (20.00 mm inlet bore diameter) That's Safety! That's Safety! SeetruLimited Notes 5 mm Nominal Bore Piped Discharge Safety Relief Valve 20 mm Nominal Bore Piped Discharge Safety Relief Valve • Maximum permissible built up back pressure is 10% of set pressure For Compressed Air & Gases SeetruLimited For Compressed Air & Gases SeetruLimited • Stable operation on ows down to 50% of valve rated capacity PED Approved • Relieving pressure is set pressure...

Open the catalog to page 5

CP 94625 (Metal Seal) specications Inlet BSP & NPT Pressure range Temperature range -196°C to 250°C (subject to seal material) Flow area 490.87mm2 (25.00 mm inlet bore diameter) That's Safety! Notes 5 mm Nominal Bore Piped Discharge Safety Relief Valve 25 mm Nominal Bore Piped Discharge Safety Relief Valve • Maximum permissible built up back pressure is 10% of set pressure For Compressed Air & Gases SeetruLimited For Compressed Air & Gases SeetruLimited • Stable operation on ows down to 50% of valve rated capacity PED Approved • Relieving pressure is set pressure +10% (0.1 bar g. below 1.3 bar...

Open the catalog to page 6

CP 97010 (Metal Seal) specications Inlet BSP & NPT Pressure range Temperature range Flow area Up to 250°C 78.54mm2 (10 mm inlet bore diameter) LP 97010 97010(METAL SEAL) LP 97010 (METAL GP 359 LP (METAL SEAL)SEAL) That's Safety! That'sThat's Safety! That's Safety! Safety! SeetruLimited SeetruLimited SeetruLimited SeetruLimited Notes 5 Bore Piped Bore Piped Discharge Valve 10 mm Nominal mmNominal Discharge Discharge Safety Relief Valve 10 mm Nominal Bore Piped Safety Relief SafetyRelief Valve 10 mm NominalBore Piped Discharge Safety Relief Valve • Relieving pressure is set pressure +10% For Compressed...

Open the catalog to page 7

CP 97015 (Metal Seal) specications Inlet BSP & NPT Pressure range Temperature range Flow area Up to 250°C 176.71mm2 (15.00 mm inlet bore diameter) LP 97015 97010(METAL SEAL) LP 97015 (METAL GP 359 LP (METAL SEAL)SEAL) That's Safety! That'sThat's Safety! That's Safety! Safety! SeetruLimited SeetruLimited SeetruLimited SeetruLimited Notes 5 Bore Piped Bore Piped Discharge Valve 15 mm Nominal mmNominal Discharge Discharge Safety Relief Valve 15 mm Nominal Bore Piped Safety ReliefSafetyRelief Valve 10 mm NominalBore Piped Discharge Safety Relief Valve • Relieving pressure is set pressure +10% For...

Open the catalog to page 8

CP 97020 (Metal Seal) specications Inlet BSP & NPT Pressure range Temperature range Flow area Up to 250°C (subject to seal material) 314.16mm2 (20 mm inlet bore diameter) LP 97020 97010(METAL SEAL) LP 97020 (METAL GP 359 LP (METAL SEAL)SEAL) That's Safety! That'sThat's Safety! That's Safety! Safety! SeetruLimited SeetruLimited SeetruLimited SeetruLimited Notes 5 Bore Piped Bore Piped Discharge Valve 20 mm Nominal mmNominal Discharge Discharge Safety Relief Valve 20 mm Nominal Bore Piped Safety Relief SafetyRelief Valve 10 mm NominalBore Piped Discharge Safety Relief Valve • Relieving pressure...

Open the catalog to page 9

CP 97025 (Metal Seal) specications Inlet BSP & NPT Pressure range Temperature range Flow area Up to 250°C (subject to seal material) 490.87mm2 (25.00 mm inlet bore diameter) LP 97025 97010(METAL SEAL) LP 97025 (METAL GP 359 LP (METAL SEAL)SEAL) That's Safety! That'sThat's Safety! That's Safety! Safety! SeetruLimited SeetruLimited SeetruLimited SeetruLimited Notes 5 Bore Piped Bore Piped Discharge Valve 25 mm Nominal mmNominal Discharge Discharge Safety Relief Valve 25 mm Nominal Bore Piped Safety Relief SafetyRelief Valve 10 mm NominalBore Piped Discharge Safety Relief Valve • Relieving pressure...

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Pressure range Temperature range Flow area 70.88mm2 (9.50 mm inlet bore diameter) That's Safety! That's Safety! Notes 10 • Maximum permissible built up back pressure is 10% of set pressure mm Nominal Bore Piped Discharge Safety Relief Valve 5 mm Nominal Bore Piped Discharge Safety Relief Valve For Refrigerants • Stable operation on ows down to 50% of valve related capacity SeetruLimited For Compressed Air & Gases • RelievingSeetruLimited pressure is set pressure +10% (0.3 bar g. below 1.55 bar g.) PED, TÜV, ASME Approved • Reseating pressure is set pressure -10% (0.3 bar g. minimum) PED Approved...

Open the catalog to page 11

Chemical Product Range

Chemical Product Range

Catalog excerpts

All Seetru Limited catalogs and technical brochures