Cast Iron Full-Lift Safety Valve DIN Threaded
TECHNICAL DESCRIPTION
Automatic full-lift safety valve, preventing critical pressure build-up in the system. Maximum unloading when reaching the set operating pressure. Full opening, at 5% overpressure from the valve setting.
When ordering a valve, please inform us of your requirements regarding valve capacity, fluid type, operating temperature, inlet size and the type of system in which it will be used.
ANNEX
• Water and steam treatment plants.
• Compressed air, technical and cryogenic gas treatment and storage plants.
• Thermal oil boilers, plants operating at high flow rates and chemical reactions involving exothermic processes.
WORKING FLUID / MEDIUM
• Water and steam.
• Thermal oil, fuels, lubricating oils and flammable hydraulic oils, petroleum, air, gas, non-flammable hydraulic fluids, boiler feed water, condensate.
OPTIONS
• Open lid with a forced opening handle.
Dimensions:DN 20 – 25
The CAST IRON FULL-LIFT SAFETY VALVE DIN THREADED is a precision-engineered safety device designed for industrial pressure systems requiring reliable overpressure protection. Manufactured from high-grade cast iron, this valve features a full-lift disc mechanism that provides maximum discharge capacity with minimal pressure build-up. The DIN threaded connections ensure secure, leak-proof installation in accordance with international standards, making it suitable for steam, gas, and liquid applications across various industries.
This safety valve incorporates advanced engineering features including:
Full-lift design for optimal flow capacity and pressure relief
DIN standard threaded connections for universal compatibility
Rugged cast iron construction for durability in harsh environments
Precision-calibrated spring mechanism for accurate set pressure operation
Temperature-resistant seating for reliable performance in high-heat applications
Ideal for boiler systems, pressure vessels, and industrial piping networks, this safety valve meets stringent safety requirements while maintaining operational efficiency. The valve’s design ensures quick reseating after activation, minimizing system downtime and maintaining continuous process safety. Each valve undergoes rigorous testing to guarantee performance reliability and compliance with industrial safety standards.

Materials
| No. | DETAILS | MATERIALS |
|---|---|---|
| 1 | Body | grey cast iron EN-JL1040 |
| 2 | Lid | grey cast iron EN-JL1040 |
| 3.1 | Lifter | DN 25x40 ÷ DN 200x300 / EN-JS1030 (GGG 40) |
| 3.2 | Lifter | up to DN 20x32 / 1.4408 (AISI 316) |
| 4 | Fasteners | stainless steel 1.4028 (AISI 420) |
| 5 | Cap | grey cast iron EN-JL1040 |
| 6 | Valve | stainless steel 1.4028 (AISI 420) |
| 7 | Separator | stainless steel 1.4028 (AISI 420) |
| 8 | Saddle | stainless steel 1.4028 (AISI 420) |
Features
| SPECIFICATION | |
|---|---|
| Standard | DIN |
| Lid connection | bolted |
| Execution | angular |
| Joining | thread |
| Management | automatically |
| DN | P | G1 x G2 (BSP) | L1 | L2 | H | H1 | Weight (kg) |
|---|---|---|---|---|---|---|---|
| DN 20 x 32 | Ru 16 | 3/4" x 1 1/4" | 80 | 65 | 320 | 112 | 4.8 |
| DN 25 x 40 | Ru 16 | 1" x 1 1/2" | 85 | 80 | 370 | 129 | 6.1 |









