All Sure Flow Butterfly Valves meet API-609, MSS SP-67, and ISO 5752 face-to-face dimensions. Butterfly Valve sizes from 2″ to 12″ are rated at 250 psi WOG service and valve sizes from 14″ and larger are rated at 200 psi WOG service. All Butterfly Valves are full rated on dead-end service.  All Butterfly Valve bodies are ductile iron 65-45-12. They are bi-directionally tested in both directions and are bubble tight with zero leakage. Lug style bodies are full rated and suitable for ASME Class 125 and ASME Class 150 flanges. Wafer style bodies are suitable for ASME Class 125, ASME Class 150, JIS, DIN or B.S. flanges. Secondary seals are self-adjusting. All elastomers and all internal bearings are non-corrosive and non-metallic. EPDM seats are suitable for 250°F sustained high temperature and capable of 2000 ppm on chlorinated applications.

A advantage of this type of valve is that the medium in the pipeline can be throttled. Due to the special type of construction, the valve also saves a lot of space. The Valve can be used for high temperatures.
This type of butterfly valve is in metallic sealing design.

Due to the short design, butterfly valves have a lower weight than a comparable gate valve. Butterfly valves offer many advantages. The streamlined design and easy installation in a pipeline make the butterfly valve a versatile all-rounder.
Centric, eccentric, double or triple eccentric design.

Constitutively one distinguishes butterfly valves between eccentric and centric. Centric means when the disc rotates 90 degrees around its axis perpendicular to the flow direction of the medium. The pivot sits in the middle of the flap seat, and thus in the center of the pipeline. Centric designs are generally available with soft sealing liners and are unsuitable for higher temperatures. By contrast, double-eccentric butterfly valves are also suitable for particularly high temperatures because the seat ring is metallic. This represents a clear advantage over the central butterfly valve. A further advantage is the usability even at high pressure in the pipeline, since centric valves are usually suitable only up to 16 bar.
Construction at a glance

✓ Centric flange adapter also called wafer-type. This design is only suitable for clamping in a line. This type of flap is suitable for both gaseous and liquid media. Can be used to control as well as to close or open the pipeline.

✓ Flange Butterfly valve also called Lug-type. The housing of this design has integrated threaded holes. As a result, a simple screwing and unscrewing the flap is made possible to a pipeline.