Self-Closing Valves Malleable Iron Straight With Weight DIN PN 16
TECHNICAL CHARACTERISTICS
Self-closing valves with “weight” are most often used in water or fuel systems, in which the valves are normally “closed”. The valve is opened by lifting the weight, relying on it to subsequently self-close again. The latter is used to avoid “forgetting” the valve in the open state – for process safety. Seal – metal / metal.
WORKING FLUIDS / MEDIUM
Water, thermal oil, fuels, oils, flammable hydraulic oils, non-flammable hydraulic oils, petroleum, boiler feed water, condensate and seawater.
EXECUTION
Other materials upon request
• Steel 1.0619
• Various flange connection standards – ANSI / JIS
• Installation is carried out in a position that ensures the correct operation of the valve (such that when the lifting force ceases, the valve closes itself by gravity).
Dimensions: DN 15 – 80
Our self-closing valves, crafted from high-grade malleable iron, are engineered for superior performance and reliability in demanding industrial applications. Designed to DIN standards and rated for PN 16 pressure, these straight valves ensure automatic shut-off to prevent backflow and enhance system safety. The inclusion of a weighted mechanism guarantees consistent operation, making them ideal for pipelines where fluid control is critical.Key features include:Constructed from durable malleable iron for excellent impact and corrosion resistanceComplies with DIN standards for guaranteed compatibility and safetyRated for PN 16 pressure, suitable for high-pressure environmentsSelf-closing mechanism with weight for reliable, automatic operationStraight design facilitates easy installation and maintenanceThese valves are perfect for use in water supply systems, industrial processing, fire protection networks, and other applications requiring fail-safe fluid control. Their robust construction ensures long service life even under harsh conditions, providing peace of mind and operational efficiency.

Materials
| No. | DETAILS | MATERIALS |
|---|---|---|
| 1 | Body | gray cast iron EN-JL1040 (GG25) |
| 2 | Lid | gray cast iron EN-JL1040 (GG25) |
| 3 | Saddle | stainless steel 1.4301 (AISI304) |
| 4 | Valve | stainless steel 1.4021 (AISI420) |
| 5 | Spindle | stainless steel 1.4021 (AISI420) |
| 6 | Stuffing box | graphite |
| 7 | Counterweight lever | steel 1.0038 (St37) |
Features
| Standard | DIN |
| Joining | EN 1092-2 |
| Construction length | EN 558, series 1 |
| Lid connection | bolted |
| Execution | straight |
| Joining | flanged |
| Management | self-closing |
| Drive | linear |
| T max. °C 120 °C Bar | 16 Bar |
| DN | PN | L | D | L1 | H | Weight (kg) |
|---|---|---|---|---|---|---|
| 15 | PN 16 | 130 | 95 | 242 | 159 | 5 |
| 20 | PN 16 | 150 | 105 | 242 | 159 | 6 |
| 25 | PN 16 | 160 | 115 | 242 | 166 | 7 |
| 32 | PN 16 | 180 | 140 | 242 | 166 | 8 |
| 40 | PN 16 | 200 | 150 | 292 | 207 | 13 |
| 50 | PN 16 | 230 | 165 | 292 | 220 | 15 |
| 65 | PN 16 | 290 | 185 | 292 | 226 | 23 |
| 80 | PN 16 | 310 | 200 | 292 | 267 | 30 |
| 100 | PN 16 | 350 | 220 | 292 | 275 | 40 |










