Description

Vulkan Dome Regulators LD 1 MD / LD 1 ND / LDS1 are engineered for precise line pressure reduction in industrial gas supply systems where conventional spring-loaded regulators often lose stability under changing inlet pressure or fluctuating consumption. The dome-loaded control principle delivers more stable downstream pressure, reduced pressure flutter and better control behaviour under variable inlet pressure and flow demand.

This product family is structured as one scalable platform: the LD 1 ND for lower-pressure duties up to 25 bar inlet and 24 bar outlet; the LD 1 MD for medium-pressure service up to 100 bar inlet and 99 bar outlet (oxygen: 40 bar inlet / 39 bar outlet); and the LDS1 as a complete assembled dome regulator unit with pilot regulator and optional gauge configurations for integrated pressure control packages.

The standard LD/LDS construction uses a brass body, EPDM/Viton seals, EPDM diaphragm, G 1 RH female inlet and outlet connections and a verified leakage rate of 1 × 10⁻⁶ mbar l/s. The family supports oxygen, inert gases, CO₂/argon, helium, nitrogen, hydrogen and compressed air through gas-specific variants and article numbers, and is positioned in the technical gas segment with application according to ISO 5171 and suitability for technical gases up to grade 4.5.

For plant designers, integrators and industrial gas users, this one product page covers the full dome regulator logic: the customer selects the required model, gas type, pressure window and instrumentation level. The LD 1 ND and LD 1 MD are standalone in-line modules for direct pipeline installation; the LDS1 is the factory-assembled answer for users who need a complete pressure control station with pilot regulator and on-unit gauges, ready to install without additional component sourcing or site assembly.

Key Advantages

• One family, three logic levels: LD 1 ND, LD 1 MD and LDS1 assembled unit — one page covers the complete dome regulator platform.
• Dome-loaded control principle for more stable outlet pressure and reduced flutter under variable demand compared to spring-loaded regulators.
• Broad gas compatibility: oxygen, inert gas, CO₂/argon, helium, nitrogen, hydrogen and compressed air.
• High-capacity performance: up to 2,400 Nm³/h in the LD 1 MD and up to 2,100 Nm³/h in selected LDS1 configurations.
• Modular commercialisation: standalone in-line module or complete assembled unit with pilot regulator and gauges.
• Positioned in the technical gas segment; application according to ISO 5171; suitable for technical gases up to grade 4.5.
• Helium-leak-proof construction with 1 × 10⁻⁶ mbar l/s across all models.

Food-Gas / Compliance Positioning

This regulator can be positioned for food-gas projects when ordered with the appropriate wetted materials, elastomers, cleanliness level and documentation package. Regulation (EC) No 1935/2004 defines the basic requirement that materials in contact with food must not transfer substances in quantities that could endanger health or unacceptably change the composition or organoleptic properties of food. Regulation (EC) No 2023/2006 adds GMP requirements for controlled manufacturing processes. In Germany, LFGB is part of the legal framework used for control of food-contact materials and articles.

Table 1. Technical Data

Table 2. Versions and Article Numbers

LD 1 MD

LD 1 ND

LDS1 — 25 bar inlet / 0.5–16 bar outlet / 1,100 Nm³/h

LDS1 — 40 bar inlet / 0.5–25 bar outlet / 1,700 Nm³/h

LDS1 — High-range configurations