Type 36-3 Safety Shut-off Valve (SSV) with Pressure Reducing Valve

Product catalog summary

Overview: This document provides technical specifications and operational details for the Type 36-3 Safety Shut-off Valve (SSV) with Pressure Reducing Valve and the Type 36-8 Safety Excess Pressure Valve (SEV), both of which are self-operated pressure regulators designed by SAMSON AKTIENGESELLSCHAFT.

Special Features:

Low-maintenance proportional regulators that do not require auxiliary energy.
Spring-loaded, single-seated valve with a balanced plug.
Frictionless plug stem seal with stainless steel bellows.
Actuator with two independent operating diaphragms, allowing continued operation even if one diaphragm fails, with an indicator for diaphragm damage.
Compliance with AGFW (German District Heating Association) regulations.

Versions:

Type 36-3: Safety shut-off valve with integrated pressure reducing valve, controlling downstream pressure to the set point. It continues operation even if an operating diaphragm ruptures. Type-tested according to AGFW document FW 504.
Type 36-8: Safety excess pressure valve, controlling upstream pressure to the set point. It also continues operation in the event of diaphragm rupture. Type-tested according to AGFW document FW 506.

Ordering Information: Specify valve type (36-3 or 36-8), DN size, body material, PN rating, and set point range in bar.

Application: Suitable for pressure regulators with set points from 2 to 11 bar, valve sizes DN 15 to 100, and pressure ratings PN 16 to 40. Applicable for water and liquids up to 150°C. Type-tested by TÜV for water.

Principle of Operation: The medium flows through the valve as indicated by the arrow. The plug position determines the flow rate. Pressure is transmitted to the diaphragm, converting it into a positioning force that moves the plug stem and valve plug, opposing the set point spring force. The regulators have two diaphragms for continued operation in case of failure, with a rupture indicator or optional pressure switch for alerts.

Installation: Install in horizontal pipelines with flow direction matching the arrow on the body and the actuator suspended downwards. Further details are in documents u EB 2546-1 and u EB 2546-2.

Technical Data:

Valve sizes range from DN 15 to 100 with varying lengths and weights.
Pressure ratings are PN 16, 25, or 40 with a maximum permissible temperature of 150°C.
Leakage class is ≤ 0.05% of the KVS coefficient according to IEC 60534-4.
Materials include cast iron, spheroidal graphite iron, and cast steel for the body, with stainless steel for the seat and plug.

Catalog excerpts

Type 36-3 Safety Shut-off Valve (SSV) with Pressure Reducing Valve-1

T 2546 EN Type 36-3 Safety Shut-off Valve (SSV) with Pressure Reducing Valve Type 36-8 Safety Excess Pressure Valve (SEV) Self-operated Pressure Regulators Typetested by TÜV (for water) Application Pressure regulators for set points from 2 to 11 bar · Valve sizes DN 15 to 100 · Pressure rating PN 16 to 40 Suitable for water and liquids up to 150 °C Special features •• Low-maintenance proportional regulators requiring no auxiliary energy •• Spring-loaded, single-seated valve with balanced plug •• Frictionless plug stem seal with stainless steel bellows •• Actuator with two independent operating diaphragms, permitting continued operation of the valve even if one diaphragm fails. An indicator at the actuator shows that the actuator is damaged. •• The regulators comply with AGFW (German District Heating Association) regulations. Versions (see Fig. 2 and Fig. 3) Type 36-3 · Safety shut-off valve (SSV) with integrated pressure reducing valve (Fig. 1) · The regulator controls the downstream pressure p2 to the adjusted set point · The regulator continues to operate in the event of an operating diaphragm rupture · Typetested according to AGFW document FW 504 Fig. 1: Type 36-3 Pressure Reducing Valve Type 36-8 · Safety excess pressure valve (SEV) (Fig. 2) · The regulator controls the upstream pressure p1 to the adjusted set point · The regulator continues to operate in the event of an operating diaphragm rupture · Typetested according to AGFW document FW 506 Ordering text Type 36-3 Safety Shut-off Valve with pressure reducing valve or Type 36-8 Safety Excess Pressure Valve DN ... Body material ..., PN ..., Set point range ... bar Fig. 2: Type 36-8 Excess Pressure Valve SAMSON AKTIENGESELLSCHAFT · Weismüllerstraße 3 · 60314 Frankfurt am Main, Germany Phone: +49 69 4009-0 · Fax: +49 69 4009

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Type 36-3 Safety Shut-off Valve (SSV) with Pressure Reducing Valve-2

Principle of operation The medium flows through the valve in the direction indicated by the arrow. The position of the plug determines the flow rate across the area released between plug (3) and seat (2). The pressure to be controlled is transmitted to the diaphragm (9) over a control line (12) and converted into a positioning force. This force moves the plug stem (4) and the valve plug (3) with it, opposing the force of the set point springs (7). The spring force (pressure set point) can be adjusted at the set point adjuster (6). The regulators are equipped with two independent operating diaphragms...

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