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Type 44-0 B Steam Pressure Reducing Valve

Type 44-0 B Steam Pressure Reducing Valve
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Type 44-0 B Steam Pressure Reducing Valve - 1

T 2628 EN Type 44-0 B Steam Pressure Reducing Valve Series 44 Self-operated Pressure Regulators Application Set points from 0.2 to 20 bar with valves G ½, G ¾ and G 1 as well as DN 15, 25, 40 and 50 · Pressure rating PN 25 Suitable for steam up to 200 °C The valve closes when the downstream pressure rises. The regulators consist of a valve and an integrated actuator with an operating bellows and a set point adjuster. Special features •• Low-maintenance proportional regulators requiring no auxiliary energy •• Wide set point range and convenient set point adjustment •• Spring-loaded, single-seated valve without pressure balancing or plug balanced by a bellows •• Stainless steel operating bellows as operating element •• Compact design with particularly low overall height •• Valve body made of red brass, spheroidal graphite iron or stainless steel Fig. 1: Red brass body with screwed ends Fig. 2: Flanged body made of spheroidal graphite iron Versions Pressure regulators for set point ranges from 0.2 to 20 bar and valve body with female thread or flanged connections Type 44-0 B Pressure Reducing Valve · Regulators with PN 25 valve suitable for steam up to 200 °C · Red brass or stainless steel body with screwed ends G ½, G ¾ and G 1 female thread (Fig. 1) · Stainless steel flanged body DN 15 and 25 (Fig. 3) · Spheroidal graphite iron flanged body DN 15, 25, 40 and 50 (Fig. 2) Special versions –– Regulator prepared for pressure gauge or external control line connection (connecting thread 1/8 NPT) Fig. 3: Flanged body made of stainless steel –– Version with electric set point adjustment (up to G 1 or DN 25) for set points up to 10 bar –– Version with pneumatic set point adjuster (up to G 1 or DN 25) –– Version as differential pressure regulator (up to G 1 or DN 25) SAMSON AKTIENGESELLSCHAFT · Weismüllerstraße 3 · 60314 Frankfurt am Main, Germany Phon

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Type 44-0 B Steam Pressure Reducing Valve - 2

Principle of operation (see Fig. 4) 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 (2) and valve seat (3). The Type 44-0 B Steam Pressure Reducing Valve is open when relieved of pressure. The valve closes when the downstream pressure (p2) rises above the adjusted set point. The pressure to be kept constant is transmitted through a borehole (4) in the valve body (1) to the operating bellows (5) where it is converted into a positioning force. It moves the valve plug depending...

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Type 44-0 B Steam Pressure Reducing Valve - 3

Table 1: Technical data · All pressures in bar (gauge) Type 44-0 B Steam Pressure Reducing Valve Stainless steel/red brass body Connection Stainless steel body Spheroidal graphite iron body Pressure rating Max. perm. differential pressure Δp Leakage class according to IEC 60534‑4 Set point range (continuously adjustable) Max. permissible ambient temperature 1) 2) With KVS 0.4 · 1.0 · 1.6 · 2.0 · 2.5 Set point range not for DN 40 and 50 Table 2: KVS coefficients Screwed ends Connection size KVS coefficients Standard version Flanges Valve size KVS coefficients 1) 2) Standard version...

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Type 44-0 B Steam Pressure Reducing Valve - 4

Table 5: Dimensions and weights · Flanged body Spheroidal graphite iron EN-GJS-400-18-LT · Stainless steel 1.4408 Valve size Weight, approx. Dimensions of the regulators in mm Body with screwed ends: red brass CC499K Body with screwed ends: stainless steel 1.4408 L Dimensions in parentheses apply to regulators with 8 to 20 bar set point range Flanged valve body: stainless steel 1.4408 Flanged valve body: spheroidal graphite iron EN-GJS-400-18-LT DN 15/25 version with manual adjuster DN 40/50 and 8 to 20 bar set point range with adjusting screw 8 to 20 bar set point range; set point...

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Type 44-0 B Steam Pressure Reducing Valve - 5

Installation The following applies: –– The direction of flow must match the direction indicated by the arrow on the body –– Install the valve in horizontal pipelines with the actuator housing suspended downward (set point adjuster facing down) Further details can be found in u EB 2626-1. Flow rate diagram for water Q 100 Fig. 6: Flow rate diagram for water Ordering text Type 44-0 B Steam Pressure Reducing Valve Body material: red brass, stainless steel or spheroidal graphite iron Version with screwed ends G … or flanged valve body DN … Set point range … bar, KVS coefficient ... Optionally,...

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Type 44-0 B Steam Pressure Reducing Valve - 6

Sizing the Type 44-0 B Steam Pressure Reducing Valve To size the Type 44-0 B Steam Pressure Reducing Valve, the steam charts (sizing characteristics with valve characteristics) for saturated steam are provided. This chart together with the additional specifications on the upstream pressure p1, downstream pressure p2 and the required steam flow rate can be used to find the right valve for the Type 44-0 B Regulator using the valve characteristics in the graph. To find the right valve, observe the diagrams on flow velocity (Fig. 7) and valve load (Fig. 8). Select the largest of the determined...

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Type 44-0 B Steam Pressure Reducing Valve - 7

All pressures stated in bar (gauge) · Steam flow rate in kg/h Saturated steam Maximum steam flow rate in kg/h Thread size Valve characterisics Fig. 8: Diagram for sizing based on valve loa

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