What is PVDF Compact Diaphragm Valve?

The PVDF compact diaphragm valve consist of a flexible disc that is sealed with a seat at the top of the valve body. It is excellent for use in restricted spaces.

Due to its widespread use in almost every industrial sector, the PVDF compact diaphragm valve is the most versatile of all valves. The main advantage is that only two parts, the valve body and the diaphragm, touch the active substance. The “Minimum Dead Leg” valve type of PVDF compact diaphragm valve is well known in the industry.

This Diaphragm Sealing System PVDF manufacturing of the compact diaphragm valves and pipe fittings. For industrial and ecological engineering as well as manufacturing industries, the wide material range makes it excellent for hostile media, scratch media and highly viscous media.

It has many other uses for PVDF compact diaphragm valves. It can be used in the manufacture of drinking and ultra-pure water used in microelectronics and semiconductor manufacturing.

The CM is a manually operated diaphragm valve of reduced dimensions and particularly compact structure, ideal for use in confined spaces.

• Connection system for solvent weld and threaded joints
• Extremely compact construction

• Internal operating components in metal totally isolated from the con-
veyed fluid

• Valve stem in STAINLESS steel
• Compressor with floating diaphragm support
• Easy to replace diaphragm seal
• Corrosion-proof internal components
• CDSA (Circular Diaphragm Sealing Angle) system offering the following
advantages:
− uniform distribution of shutter pressure on the diaphragm seal
− reduction in the tightening torque of the crews fixing the actuator to
the valve body
− reduced mechanical stress on all valve components (actuator, body and
diaphragm)
− easy to clean valve interior
− low risk of the accumulation of eposits, contamination or damage to
the diaphragm due to crystallisation
− operating torque reduction

Technical specifications
Construction	Compact single wear diaphragm valve
Size range	DN 12 ÷ 15
Nominal pressure	PN 6 with water at 20 °C
Temperature range	0 °C ÷ 60 °C
Coupling standards	Solvent welding: EN ISO 1452, EN ISO 15493, BS 4346-1, DIN 8063, NF T54-028, ASTM D 2467, JIS K 6743. Can be coupled to pipes according to EN ISO 1452, EN ISO 15493, DIN 8062, NF T54-016, ASTM D 1785, JIS K 6741. Thread: ISO 228-1, DIN 2999, ASTM D 2464, JIS B 0203.
Reference standards	Construction criteria: EN ISO 16138, EN ISO 1452, EN ISO 15493 Test methods and requirements: ISO 939 Installation criteria: DVS 2204, DVS 2221, UNI 11242
Valve material	Body: PVC-U Bonnet and handwheel: PA – GR
Seal material	EPDM, FKM, PTFE
Control options	Manual control; pneumatic actuator

COMPACT DIAPHRAGM VALVE

PRESSURE VARIATION ACCORDING TO TEMPERATURE

For water and non-hazardous fluids with regard to which the material is classified as CHEMICALLY RESIS-TANT. In other cases, a reduction of the nominal pressure PN is required(25 years with safety factor).

PRESSURE DROP GRAPH

K_V 100 FLOW COEFFICIENT

The K_v 100 flow coefficient is the Q flow rate of litres per minute of water at a temperature of 20°C that will generate Δp= 1 bar pressure drop at a certain valve position. The Kv100 values shown in the table are calculated with the valve completely open.