Valtek Mark One Globe Control Valve 2" Class 300

The Valtek Mark One is a globe-style sliding-stem control valve manufactured by Flowserve's Valtek Division — one of the three most specified control valve brands in Saudi ARAMCO refinery and gas plant control loop inventories, alongside Fisher and Masoneilan. The MO2-300 model designates a two-inch body with ASME Class 300 flanges (suitable for pressures up to 51.1 bar at ambient temperature), a configuration that covers the wide-ranging flow control, pressure control, and temperature control loops that govern product quality and process safety in ARAMCO GOSP separators, gas compression trains, and refinery distillation units. The Mark One's characteristic globe body geometry provides inherently high control rangeability — typically 50:1 — and the choice of equal percentage, linear, or quick opening trim characteristics enables the control valve to be precisely matched to the process gain of each loop without requiring a custom engineered body, reducing procurement lead time and inventory complexity.

The Mark One's patented spring-opposed diaphragm actuator with cast iron yoke and 316 stainless steel actuator stem provides the rugged, reliable operation expected in ARAMCO process service — the actuator is designed to deliver the specified bench-set and seat load forces without creep or relaxation over twenty years of continuous service in the 50°C ambient temperature of the Arabian Gulf coast. The top-entry body design allows trim removal for inspection and replacement without removing the valve from the pipeline — an API-aligned maintenance philosophy that reduces turnaround time at ARAMCO planned maintenance shutdowns. The integral PTFE V-ring packing provides emission-compliant sealing to ISO 15848-1 Class B, satisfying ARAMCO's VOC emission control requirements for hydrocarbon control valves in process units adjacent to GOSP worker facilities and in ARAMCO's zero-fugitive-emission sustainability programme.

Saudi ARAMCO's Instrument Engineering Division specifies Valtek control valves in ARAMCO Engineering Standard SAES-J-700 (Instrument Fittings and Accessories) and the associated Instrument Equipment Standard IES-J-705 for process control valves. Mark One units are installed in ARAMCO GOSP control loops — liquid level control on three-phase separator vessels, pressure control on gas compression suction headers, and temperature control on crude stabilisation column reboilers — as well as in the Ras Tanura and Jazan refinery process control systems for hydrocarbon fractionation, product blending, and utility steam control. The Mark One's Cv range from 0.1 to 2,400 in a single body series enables it to cover the full flow range from small chemical injection trim to large crude oil main flow control on a unified platform with common spare parts, repair procedures, and technician training across ARAMCO's maintenance workforce.

Razz Middle East is the authorised Flowserve Valtek distributor for Saudi Arabia, supplying Mark One control valves with full ARAMCO instrument documentation packages including ISA instrument data sheets, flow calculations, valve sizing reports, and valve signature data from factory acceptance tests. We maintain stock of Mark One bodies in 1", 1.5", 2", and 3" Class 150/300/600 with the standard ARAMCO trim options — balanced and unbalanced plug, standard and low-noise trim, and anti-cavitation trim for high-differential pressure liquid services — ready for rapid deployment to ARAMCO, SABIC, and EPC contractor project sites. Our instrument engineers provide ISA S75.01 valve sizing, body and trim selection, actuator spring range specification, and positioner calibration during the project engineering phase, with on-site commissioning and loop-tuning support during plant startup.