The a series is designation given by RADMAN to its full-nozzle valves, specifically designed for gas, steam, liquid, and multi-phase fluid applications. The design criteria and application limits comply with the ASME Section VIII and ASME Section I standards. The a Series is divided into two categories: a1 Series and a2 Series.
a1 series: API 526 (ASME Sec. VIII)
The a1 Series is designed in accordance with ASME Sec. VIII and API 526 standards. It is suitable for use with liquid, gas, steam, and multi-phase states. With a wide range of types (conventional, bellows, and balanced piston), combined with an extensive selection of connections, materials, and accessories, the a1 Series can be tailored to meet any process or service requirement, providing the optimal solution for diverse applications.
Features and Benefits
. Lighter and more compact construction:
Continuous design improvements have led to the development of smaller and lighter valves, meeting current industry demands for space and weight savings.
. Interchangeable parts:
Valves in the a1 Series can be easily modified between types (gas, liquid, conventional, and bellows) by changing only a few components.
. Simplified maintenance and service:
Re-engineering efforts have reduced the number of parts, making maintenance simpler and more cost-effective.
. Material Selection:
A wide range of materials is available, including non-ferrous options for low-temperature and oxygen service, as well as exotic alloys for use in chemical and processing industries.
. High performance springs:
The safety relief valve springs are specifically designed to ensure set-point repeatability.
. Guiding surface:
The material selection for guiding components, along with a self-aligning disc and spindle pivot point, ensures correct alignment and prevents galling of guiding surfaces, as required by relevant codes.
. Seat leakage integrity:
The choice of nozzle and disc materials, coupled with superior lapping techniques, ensures seat tightness that exceeds the standards required by relevant codes.
. Adjustable blowdown:
The valve reseating pressure (blowdown) can be easily adjusted to meet specific performance requirements.
. Nozzle design:
The method and location of nozzle attachment to the body prevent the transmission of pipe stresses to the nozzle/disc mating surface.
. API 526 dimensions:
Standardized dimensions allow for confident and precise pipework layout planning.