More Zwick Triple Offset Valves for National Tank Farm

The Client & Application

Our client a leader in chemical and fuels required Triple Offset Valves (TOV) for their national tank farms to tie in to the Transnet Multi Product Pipeline. Their numerous other chemical plants throughout the world as well as their local refinery already use hundreds of Zwick Tri-Con valves, so they had a proven track record to draw on when making their final decision on what TOV to select for their tank farm tie ins.

Currently their local production plants use Zwick Tri-Con Triple Offset Valves up to 54”, so valves in 12” and 20” on final product (hydrocarbons) would give them a life time far longer than those on harsh production applications experienced in their chemical plants.

Rotork Electro Hydraulic actuator were fitted to the 12” and 20” Zwick B1 Tri-Con valves with gate valve face to face dimensions. This application for Zwick Tri-Con called for class V shutoff whereas Zwick can provide up to Zero leakage and as the product is final product, the valve will not be subjected to the harsh conditions like a high pressure and high temperature chemical plant.

Viresh Girdharie our Internal Sales Manager attended the FAT which was also attended by an end user senior quality control inspector with extensive experience. Pressure tests were done on all valves and the requirement was that the valve holds pressure at 22 bar for minimum 2 minutes. Viresh reports that everything was perfect and the shutoff class was exactly what clients have come to expect from Zwick.

Rotork Actuator Supervisor: “The Zwick valves seal so well, that I could easily leave these valves on pressure all night.”








Zwick Product Range

Zwick manufacture TOV‘s up to 88″ (DN2200) and PN100 / ANSI 900 as well the unique Tri-Shark rotary control valve which offers a rangeability of 100 : 1, ensuring control and Zero leakage all in one. Tri-Shark 100% Control / 100% Tight.

Talk to one of our skilled technical specialists today, to see how we can assist you with your Triple Offset Valves.







Download Request

Please fill in your details below to view the brochure.

Scan the code