Profile: Petrosin Energy, Inc. is involved in oil and gas, engineering processing, engineering design, operation & maintenance services. We are an ISO 9001 certified company. Our engineering and contracting division provides design and construction of plant facilities for the oil & gas, petrochemical, refining, power generation and other related industries. We supply a wide range of block valves consisting of a variety of ball, gate, globe, check, needle and butterfly valves.