LVCS-1 type spring return check valve

A forged body check valve manufactured according to API 602 Standard with up to 50 mm nominal size, for wide pressure-, and temperature ranges. The piston type check valve is made with helical spring returning closing element. The valve can be installed only for one way streams. In case of back stream the valve closes due to spring force and the pressure of medium. The valve seat and the disc is welded with Stellite 6 for the purpose of excellent wearing resistance. The sealing of the bonnet is highly flexible spiral wound gasket. At higher pressures the sealing is made of stainless steel gasket ring. The check valves can be manufactured also with threaded valve seats on demand.

Dimension range: DN 10 - 50 / NPS 3/8" - 2"
Pressure range: PN 16 – 400 / Class 150 - 2500
Temperature range: - 60°C - +550°

Main features:

• Forged body
• Bolted bonnet
• Spring return disc closing on conical surface
• Flanged, threaded, butt welded, or socket welded ends

Design options:

• Renewable valve seat

Materials:

• ASTM A105
• ASTM A350 LF2
• ASTM A182 F11
• ASTM A182 F316(L)

Design standards:

• Construction: API 602 / ISO 15761
• Face to face length: ASME B16.10
• Socket welded type: ASME B16.11; DIN 3239
• Butt welded type: ASME B16.25; EN 12627
• Threaded type: ASME B1.20.1; ISO 228
• Flanged type: ASME B16.5; EN 1092-1; GOST 12815; GOST 12821
• Pressure test: API 602; EN 12266-1
• NACE design: NACE MR0175 / ISO 15156

LVCS-2 type swing check valve

This swing type check valve is made for wide pressure-, and temperature ranges. The valve can be installed only for one way streams. In case of back stream the valve closes due to own weight of the closing element and also the pressure of the medium. The valve body in welded for smaller sizes and of casted design for bigger sizes. The valve seat and the disc is welded with Stellite 6 for the purpose of excellent wearing resistance. The valve seat can be made in welded or renewable, threaded versions. The sealing of the bonnet is highly flexible spiral wound gasket. For higher pressures the sealing is made of stainless steel gasket ring, or self-sealing graphite ring.

Dimension range: DN 50 - 150 / NPS 2" - 6"
Pressure range: PN 16 – 250 / Class 150 - 1500
Temperature range: - 60°C - +427°C

Main features:

• Cast or welded body
• Bolted bonnet
• Self adjusting disc
• Flanged, or butt welded ends

Design options:

• Renewable valve seat
• Pressure seal bonnet in case of higher pressures

Materials:

• ASTM A350 LF2; ASTM A352 LCC
• ASTM A479 316(L); ASTM A351 CF8M

Design standards:

• Construction: API 6D / ISO 14313
• Face to face length: ASME B16.10
• Butt welded type: ASME B16.25; EN 12627
• Flanged type: ASME B16.5; EN 1092-1; GOST 12815; GOST 12821
• Pressure test: API 6D; EN 12266-1
• NACE design: NACE MR0175 / ISO 15156