Spirax Sarco Inc.
Contact us

Fig 34 Carbon Steel Y-type Strainer

  • Fig 34 Carbon Steel Y-type Strainer
  • Fig 34 Carbon Steel Y-type Strainer

FIG34

Fig 34 Carbon Steel Y-type Strainer

Integrally flanged carbon steel Y-type strainer for DN15 to DN400 pipelines, with EN, ASME and JIS/KS flange options and selectable stainless-steel or Monel screens.

Contact us

Fig 34 carbon steel Y-type strainer

The Spirax Sarco Fig 34 is an integrally flanged carbon steel Y-type strainer designed to remove rust, scale and other debris from pipelines. Its documented range spans DN15 to DN400, with EN, ASME and JIS/KS flange options selected according to size, material standard and required pressure class.

The screen specification scales with the line size: the standard stainless-steel screen uses 0.8 mm perforations from DN15 to DN80, 1.6 mm perforations from DN100 to DN200 and 3 mm perforations from DN250 to DN400. Alternative perforations, mesh sizes and Monel screens are available for applications that need a different balance between debris retention and pressure drop.

Range and selection

  • DN15-DN200, EN material: EN 1092 PN40 flanges.
  • DN15-DN200, ASTM material: ASME Class 150, ASME Class 300 and JIS/KS 20 flanges.
  • DN250-DN400: EN 1092 PN16, PN25 or PN40; ASME B16.5 Class 150 or 300; and JIS/KS 10 or 20.
  • Service envelope: pressure and temperature limits depend on flange and material configuration; use the applicable tables and curves below rather than a single headline rating.

For installation, align the body arrow with the flow direction. In steam or gas service the strainer pocket should lie in the horizontal plane; in liquid service it should point downwards. The screen and cap or cover gasket are available as service parts.

EN material, DN15 to DN200

Technical Information: TI-P064-01, CMGT Issue 14.

The Fig 34 is a carbon steel integrally flanged Y-type strainer in EN material. It complies with the European Pressure Equipment Directive 2014/68/EU. A manufacturer's Typical Test Report is standard; EN 10204 3.1 certification for body and cap is available by order.

Sizes, screens and connections

Sizes: DN15, DN20, DN25, DN32, DN40, DN50, DN65, DN80, DN100, DN125, DN150 and DN200. Standard flange: EN 1092 PN40.

ScreenSpecificationSize range
Standard stainless steel0.8 mm perforationsDN15-DN80
Standard stainless steel1.6 mm perforationsDN100-DN200
Optional stainless steel1.6 mm or 3.0 mm; mesh 40, 100 or 200As specified
Optional Monel0.8 mm, 1.6 mm or 3.0 mm; mesh 100As specified
Strainer sizeBlowdown valveDrain valve
DN15¼ in¼ in
DN20-DN25½ in½ in
DN32-DN401 in¾ in
DN50-DN1251¼ in¾ in
DN150-DN2002 in¾ in

Pressure and temperature limits

Fig 34 EN material PN40 pressure and temperature curve
PN40 operating envelope; the shaded region is not permitted.
Body design conditionPN40
PMA40 bar g at 50 °C
TMA400 °C at 23.8 bar g
Minimum allowable temperature-29 °C
PMO40 bar g at 50 °C
TMO400 °C at 23.8 bar g
Vacuum serviceSafe under full vacuum conditions
Cold hydraulic test pressure69 bar g

Materials

Fig 34 EN material construction for DN15 to DN200
No.PartMaterial
1BodyCarbon steel 1.0619
2Cap, DN15-DN50Forged steel C22.8
2Cap, DN65-DN200Carbon steel 1.0619
3Cap gasketReinforced exfoliated graphite
4Strainer screenStainless steel ASTM A240 316L
5BoltsStainless steel ASTM A193 B7

Flow coefficients

ScreenDN15DN20DN25DN32DN40DN50DN65DN80DN100DN125DN150DN200
Perforations 0.8/1.6/3.0 mm581322294672103155237340588
Mesh 40/100581322294672103155237340588
Mesh 20046101723375883124186268464

Cv (UK) = Kv × 0.963; Cv (US) = Kv × 1.156.

Dimensions and weights

Fig 34 EN material dimension reference A B and C
SizeA mmB mmC mmScreening area cm²Weight kg
DN1513070110272.1
DN2015080130432.9
DN2516095150733.8
DN321801302351356.5
DN402001462601649.0
DN5023018032025110.5
DN6529020032532717.5
DN8031020533036124.0
DN10035125540554530.0
DN12540031551084349.0
DN150480345560111768.0
DN2006004407101909128.0

Installation, ordering and service parts

Install in the body-arrow flow direction. For steam or gases, keep the pocket in the horizontal plane; for liquids, point it downwards. For full procedures see Installation and Maintenance Instructions IM-S60-18. The product is recyclable when disposed of with due care.

Available spares are the strainer screen and a packet of three cap gaskets. State the strainer size, screen material and required perforation or mesh when ordering.

SizeQuantityFastenerTorque N m
DN15122 mm / M2850-55
DN20127 mm / M3260-66
DN25127 mm / M42100-110
DN32-DN40419 mm / M12 × 3020-24
DN50619 mm / M12 × 3520-24
DN65819 mm / M12 × 3520-24
DN80819 mm / M12 × 3530-35
DN100824 mm / M16 × 4550-55
DN125830 mm / M20 × 5070-77
DN150830 mm / M20 × 5580-88
DN2001236 mm / M24 × 65120-130

ASTM material, DN15 to DN200

Technical Information: TI-P064-02, CMGT Issue 15.

This integrally flanged carbon steel Y-type strainer is offered in ASTM material and removes rust, scale and other pipeline debris. It complies with the European Pressure Equipment Directive 2014/68/EU. A manufacturer's Typical Test Report is standard; EN 10204 3.1 certification for body and cap is available by order.

Sizes, screens and connections

Sizes: DN15-DN200 (½-8 in). Standard flanges: ASME Class 150, ASME Class 300 and JIS/KS 20.

ScreenSpecificationSize range
Standard stainless steel0.8 mm perforationsDN15-DN80
Standard stainless steel1.6 mm perforationsDN100-DN200
Optional stainless steel1.6 mm or 3.0 mm; mesh 40, 100 or 200As specified
Optional Monel0.8 mm, 1.6 mm or 3.0 mm; mesh 100As specified
Strainer sizeBlowdown valveDrain valve
DN15¼ in¼ in
DN20-DN25½ in½ in
DN32-DN401 in1 in
DN50-DN1251¼ in1¼ in
DN150-DN2002 in¾ in

Pressure and temperature limits

Fig 34 ASTM material ASME and JIS pressure and temperature curve
Operating envelopes vary by ASME Class 150, ASME Class 300 and JIS/KS 20 flange.
Body design conditionPN50 / ASME 300
PMA50 bar g at 37.7 °C (725 psi g at 100 °F)
TMA398.8 °C at 34.8 bar g (750 °F at 505 psi g)
Minimum allowable temperature-29 °C (-20.2 °F)
PMO50 bar g at 37.7 °C
TMO398.8 °C at 34.8 bar g
Vacuum serviceSafe under full vacuum conditions
Cold hydraulic test pressure78 bar g (1131 psi g)

Materials

Fig 34 ASTM material construction for DN15 to DN200
No.PartMaterial
1BodyCarbon steel ASTM A216 WCB
2Cap, DN15-DN50Forged steel A105N
2Cap, DN65-DN200Carbon steel ASTM A216 WCB
3Cap gasketReinforced exfoliated graphite
4Strainer screenStainless steel ASTM A240 316L
5BoltsCarbon steel ASTM A193 B7

Flow coefficients

ScreenDN15DN20DN25DN32DN40DN50DN65DN80DN100DN125DN150DN200
Perforations 0.8/1.6/3.0 mm581322294672103155237340588
Mesh 40/100581322294672103155237340588
Mesh 20046101723375883124186268464

Dimensions and weights

Fig 34 ASTM material dimension reference A B and C
SizeASME 150 A mmASME 300 A mmJIS/KS 20 A mmB mmC mmArea cm²kg
DN1512012712670110272.1
DN2014415015080130432.9
DN2515416015995150733.8
DN321801801781302351356.5
DN402002082021462601649.0
DN5023024023218032025110.5
DN6529028927820032532717.5
DN8031031129720533036124.0
DN10035135133325540554530.0
DN12540140138331551084349.0
DN150473478461345560111768.0
DN2005936005774407101909128.0

Installation, warning and service parts

Install in the body-arrow flow direction. Keep the pocket horizontal for steam or gas and point it downwards for liquids. For full procedures see Installation and Maintenance Instructions IM-S60-18. The cap gasket contains a thin stainless-steel support ring that can cause injury if handled or disposed of carelessly.

Available spares are the strainer screen and a packet of three cap gaskets. State size, screen material, perforation or mesh, and flange connection when ordering.

SizeQuantityFastenerTorque N m
DN15122 mm50-55
DN20127 mm60-66
DN25127 mm100-110
DN32-DN40419 mm / M12 × 3020-24
DN50619 mm / M12 × 3520-24
DN65819 mm / M12 × 3520-24
DN80819 mm / M12 × 3530-35
DN100824 mm / M16 × 4550-55
DN125830 mm / M20 × 5070-77
DN150830 mm / M20 × 5580-88
DN2001236 mm / M24 × 65120-230

Large-bore range, DN250 to DN400

Technical Information: TI-P168-07, CMGT Issue 6.

This integrally flanged Fig 34 removes rust, scale and other debris from large-bore pipelines. It complies with the European Pressure Equipment Directive 2014/68/EU and carries the CE mark when required. EN 10204 3.1 material certification for body and cover is available.

Sizes, screens, connections and Kv

Sizes: DN250, DN300, DN350 and DN400. Standard raised-face connections are EN 1092 PN16, PN25 or PN40; ASME B16.5 Class 150 or Class 300; and JIS/KS 10 or 20.

ScreenSpecification
Standard stainless steel3 mm perforations
Optional perforations0.8 mm, 1.6 mm or 5 mm
Optional mesh40, 100 or 200
Optional MonelAvailable on request
ScreenDN250DN300DN350DN400
Perforated Kv950130018002300
Mesh Kv850110015001900

The cover can be drilled for a 2 in blowdown valve and a 2 in drain valve.

Materials

Fig 34 large-bore EN and ASME construction
No.PartMaterial
1BodyCarbon steel EN 10213 1.0619+N / ASTM A216 WCB
2CoverCarbon steel EN 10213 1.0619+N / ASTM A216 WCB or ASTM A105N
3GasketReinforced exfoliated graphite
4ScreenStainless steel
5StudCarbon steel ASTM A193 B7
6NutCarbon steel ASTM A194 2H

EN pressure and temperature limits

Fig 34 DN250 to DN400 EN pressure and temperature curves
RatingPMATMAPMO saturated steamTMO
PN4040 bar g at 50 °C400 °C at 23.8 bar g30.7 bar g at 237 °C400 °C at 23.8 bar g
PN2525 bar g at 50 °C400 °C at 14.8 bar g20 bar g at 215 °C400 °C at 14.8 bar g
PN1616 bar g at 50 °C400 °C at 9.5 bar g13.2 bar g at 196 °C400 °C at 9.5 bar g

ASME pressure and temperature limits

Fig 34 DN250 to DN400 ASME pressure and temperature curves
RatingPMATMAPMO saturated steamTMO
Class 30051.1 bar g at 38 °C425 °C at 28.8 bar g41.5 bar g at 254 °C425 °C at 28.8 bar g
Class 15019.6 bar g at 38 °C425 °C at 5.5 bar g13.6 bar g at 197 °C425 °C at 5.5 bar g

JIS/KS pressure and temperature limits

Fig 34 DN250 to DN400 JIS KS pressure and temperature curves
RatingPMATMAPMO saturated steamTMO
JIS/KS 2034 bar g at 120 °C425 °C at 20.0 bar g30.1 bar g at 236 °C425 °C at 20.0 bar g
JIS/KS 1014 bar g at 120 °C300 °C at 10.0 bar g12.4 bar g at 193 °C300 °C at 10.0 bar g

Minimum allowable and operating temperature: -29 °C. The product is safe under full vacuum conditions. Maximum cold hydraulic test pressure is 1.5 × PMA.

Dimensions and weights

Fig 34 DN250 to DN400 dimension reference A B C and D
SizeEN/JIS A mmASME 150 A mmASME 300 A mmB EN/ASME mmC EN/ASME mmScreen area mm² EN/ASMEWeight range kg
DN250730622622515 / 560957 / 1005371800 / 371800163-218
DN300850699711570 / 6401020 / 1098439300 / 439300214-344
DN350980787838620 / 7701205 / 1320653400 / 593800377-454
DN4001100914864710 / 7301340 / 1360641400 / 641400487-617

Installation, warning and service parts

Install in the body-arrow flow direction. Keep the pocket horizontal for steam or gas and point it downwards for liquids. For full procedures see Installation and Maintenance Instructions IM-S60-18. The cover gasket contains a thin stainless-steel support ring that can cause injury if mishandled.

Available spares are the strainer screen and a packet of three cover gaskets. State size, flange connection, screen material and required perforation or mesh when ordering.

SizeConnectionQuantityFastenerTorque N m
DN250ASME Class 150 / EN161¼ in / ¾ in-10UNC160-180
DN250ASME Class 300161 7/16 in / 7/8 in-9UNC180-200
DN300ASME Class 150 / EN161¼ in / ¾ in-10UNC200-220
DN300ASME Class 300181 7/16 in / 7/8 in-9UNC210-230
DN350ASME Class 150 / EN201¼ in / ¾ in-10UNC220-240
DN350ASME Class 300221 7/16 in / 7/8 in-9UNC230-250
DN400ASME Class 150 / EN221 7/16 in / 7/8 in-9UNC330-350
DN400ASME Class 300161 13/16 in / 1⅛ in-7UNC480-530

Talk to our technical team

Contact Spirax Sarco for product selection, documentation or replacement guidance.

Contact page+86 157 9019 6438