SMP Controls Systems Private Limited

sales@scspl-smp.com

PFA/PTFE Lined, Centric Bi-directional

Model K51-W: Wafer type , Model K52-L: Lug type & Model K53-F: Flange type type

Applications

These valves are essential for diverse and corrosive applications, handling hazardous and pure liquids, gases, and vapors with ease. They are utilized in industries such as pharmaceuticals, foundries, mining, chemicals, petrochemicals, pulp and paper, and under vessels. These valves excel where constant torque and minimal maintenance are paramount

Suitable for on-off and control services

Range and Features

TYPE	DESIGN	PRESSURE	SEAT	FLANGE SUIT TO	2" TO 16"
Wafer	Centric Bi-directional	PN10, PN16	PTFE, PFA, PFA CONDUCTIVE, TFM, TFM CONDUCTIVE	ANSI 150#	Yes
Lug	Centric Bi-directional	PN10, PN16	PTFE, PFA, PFA CONDUCTIVE, TFM, TFM CONDUCTIVE	ANSI 150#	Yes
Flange	Centric Bi-directional	PN10, PN16	PTFE, PFA, PFA CONDUCTIVE, TFM, TFM CONDUCTIVE	ANSI 150#	Yes

Design, Manufacturing and Testing Standards – Technology at a Glance

DESCRIPTION
Tangent PFA/PTFE Lined Centric Bi-directional Butterfly valves are designed to ensure a tight fit around the disc for bubble-tight shut-off in both directions and provide constant torque with no maintenance. “A major advantage of Tangent products is their international compatibility.” The exceptional design features a one-piece thin disc stem lined with 3mm molded PFA, providing a high Kv value. The liner and disc are the only two valve parts in contact with the medium. Tangent has improved the disc design to reduce deflection at higher pressures and achieve a tighter in-line seal for the stem sealing system. Primary shaft sealing is achieved by preloaded contact between the disc and liner hub, with secondary shaft sealing ensured by oversizing the shaft diameter in relation to the shaft hole in the liner. The liner and disc are molded and machined to close tolerances to provide low torque, less stress, and deformation during opening and closing. A PTFE atmospheric seat protects internal components from atmospheric corrosion and provides a locating ring for actuator mounting. The fully encapsulated bottom shaft eliminates potential leak paths at the bottom of the valve and eliminates the need for additional sealing elements.

DESCRIPTION

Tangent PFA/PTFE Lined Centric Bi-directional Butterfly valves are designed to ensure a tight fit around the disc for bubble-tight shut-off in both directions and provide constant torque with no maintenance.

“A major advantage of Tangent products is their international compatibility.”

The exceptional design features a one-piece thin disc stem lined with 3mm molded PFA, providing a high Kv value. The liner and disc are the only two valve parts in contact with the medium.

Tangent has improved the disc design to reduce deflection at higher pressures and achieve a tighter in-line seal for the stem sealing system.

Primary shaft sealing is achieved by preloaded contact between the disc and liner hub, with secondary shaft sealing ensured by oversizing the shaft diameter in relation to the shaft hole in the liner. The liner and disc are molded and machined to close tolerances to provide low torque, less stress, and deformation during opening and closing.

A PTFE atmospheric seat protects internal components from atmospheric corrosion and provides a locating ring for actuator mounting. The fully encapsulated bottom shaft eliminates potential leak paths at the bottom of the valve and eliminates the need for additional sealing elements.

Specifications:

Design standards as per EN 593 or API 609 (Category B) as standard, with other standards available on request.
Testing standards comply with API 598 and FCI 70-2.
Certification includes EN10204 Type 3.1 and manufacturing under ISO 9001:2015 Quality Management System.
Casting inspection follows MSS-SP-55 as standard, with other applicable standards available.
Valve trims available with combinations of casting materials like WCB, CF8, CF8M, CF3M, GR. 4A-5A, NAB, Aluminum Alloys, etc., and seat materials including RTEF, PTFE, UHMWPE, METAL, FIRE SAFE.
All valves are 100% factory tested (Hydro, Pneumatic) and inspected per standard protocols.

TECHNICAL DATA:

Model K51 W - Size: 2” (50 mm) to 12” (300 mm)

Model K52 L - Size: 2” (50 mm) to 12” (300 mm)

Model K53 F - Size: 14” (350 mm) to 16” (400 mm)

Features and Benefits :

Actuator/gearbox mounting flange is standardized according to ISO 5211.
Lugged body options are available with drilled and tapped (metric or imperial) configurations per ANSI 150# and 300# standards.
Features a two-piece shaft design to enhance disc efficiency and increase the Cv value.
Compatible with lever, gear, pneumatic, and electric actuators.
Valve shape is indicative only.
Q represents the disc chordal dimension at the valve face, ensuring disc clearance into the pipe or equipment.

General Notes

Tailored customization and automation to meet specific customer requirements.
Standard certificate of compliance issued to EN10204 Type 3.1.
Maintaining safety stock levels as per customer specifications.
Every valve undergoes comprehensive factory testing and inspection in accordance with industry standards.
Availability of various trims to suit unique customer needs.
Assisting customers with sourcing additional product requirements.
Consultation services with the factory for torque and other technical details.