Fittings & Valves

The Fittings & Valves section lists valves, actuators, valve accessories and line fittings that Seven Star LLC supplies to process plants, utilities and contractors in Oman. The largest groups are Masoneilan and Fisher control valves and their spare parts, AUMA actuators, LESER safety valves and Spirax Sarco steam valves.

Buyers looking for a valves supplier in Muscat will find ten sub-categories here, arranged by function so that an engineer can go straight to the right type.

Valve sub-categories and what each one is for

Control Valves holds globe, rotary and butterfly valves that throttle flow under a control signal, with seal and packing kits for valves already in operation, and a sub-group of pressure independent control valves for chilled water circuits. Valve Actuators covers the electric, pneumatic and hydraulic drives that move those valves, and Valve Positioners the instruments that hold the valve at the position the control system asks for. Safety Relief Valves contains the valves that protect vessels and piping from overpressure.

Regulators are self-operated devices that reduce or hold a pressure without external power, including instrument air filter regulators and volume boosters. Solenoid Valves are electrically switched valves for pilot air, gas trains, refrigerant and general fluid duties. Globe Valves lists bellows sealed stop valves for steam and process isolation. Clean Steam groups stainless steel traps, separators, filters and valves for sterile and hygienic steam. Hydraulic Valves & Components covers directional valves for oil hydraulic power units, and Pipes & Fittings holds tube fittings, pipe couplings and conduit fittings for hazardous areas.

Standards and documents that usually apply to industrial valves

Valves are specified against the piping class of the plant: ASME pressure classes or EN PN ratings, a flange or end connection standard, and body and trim materials suited to the fluid. Sour gas duty calls for materials that comply with NACE MR0175 / ISO 15156. Actuators, positioners and solenoid coils need ATEX or IECEx certification when they sit in a classified area. For pressure-containing parts, buyers normally ask for EN 10204 material certificates and a pressure test report.

What to send for a valve quotation

The simplest route is the tag number with its datasheet, or the model and serial number from the nameplate. Without those, send the valve type, size, pressure rating, end connections, body and trim materials, and the fluid with its pressure and temperature. For actuated valves add the air supply or voltage and the fail position. We check the configuration against the manufacturer documentation for buyers across the GCC.