Valves - inline valves

Block-and-bleed valves

Overview

ASEPCO Weirless Radial diaphragm™ block-and-bleed valve

A reliable block-and-bleed valve eliminating the usual dead leg between seal points.

Features and benefits

  • Easy to assemble and inspect
  • Eliminates sources of contamination—reducing cleaning time
  • Clean, self-draining design
  • Block body design eliminates dead leg area
  • Patented radial diaphragm, eliminates entrapment for easy cleaning
  • Up to 80% reduction in maintenance costs
  • Never needs re-tightening or adjustment

Technical summary

Mounting typeClamp, In-line 
Max. operating pressure10 bar
Max. operating pressure150 psi
Compatible actuatorsFail closed, Fail open, Manual, Pneumatic 
Compatible diaphragmsEPDM 
Surface finish optionsElectropolished, Max 10 micro-inch Ra (0.25 µm Ra), Max 15 micro-inch Ra (0.375 µm Ra), Max 20 micro-inch Ra (0.5 µm Ra) 
Certification and complianceISO 9001 
StandardsASME BPE, CE-PED 

Technical Summary table lists features available within the range. See ‘Specifications’ tab for model specific information.

Performance

Flow rates
Size (inches) Cv at 1 psi (0.07 bar)
LPM USGPM
0.5 x 0.5 17.8 4.70
0.75 x 0.5 36 9.51
0.75 x 0.75 36 9.51

Specifications

Technical specifications

Block-and-bleed valves
Mounting typeClamp, In-line 
Flow rate17.8 - 36 l/m
Flow rate4.7 - 9.5 USGPM
Mounting sizes0.5 in, 0.75 in, 1.0 in, 1.5 in 
Inlet/outlet ConnectionsHygienic clamp, Tube end 
Max. operating pressure10 bar
Max. operating pressure150 psi
Operating temperature range -35 °C to 135 °C
Operating temperature range -30 °F to 275 °F
Compatible actuatorsFail closed, Fail open, Manual, Pneumatic 
Compatible diaphragmsEPDM 
Surface finish optionsElectropolished, Max 10 micro-inch Ra (0.25 µm Ra), Max 15 micro-inch Ra (0.375 µm Ra), Max 20 micro-inch Ra (0.5 µm Ra) 
Certification and complianceISO 9001 
StandardsASME BPE, CE-PED 
Weight0.68 - 2.5 kg
Weight1.5 - 5.6 lbs

Block-and-bleed valves dimensions

Block and bleed valve dimensions
Line x Branch Size (inches) A B C D E F
mm in mm in mm in mm in mm in mm in
0.5 x 0.5 110.5 4.35 43.2 1.70 0.0 0.00 31.5 1.24 69.9 2.75 67.3 2.65
0.75 x 0.5 114.8 4.52 48.8 1.92 2.5 0.10 38.1 1.50 95.2 3.75 69.9 2.75
0.75 x 0.75 133.4 5.25 67.3 2.65 0.0 0.00 41.4 1.63 94.0 3.70 65.5 2.58

Weights

Block and bleed valve weights
Size (inches) Valve Body Total Weight with Manual Actuator
kg lb kg lb
0.5 x 0.5 0.68 1.50 1.20 2.60
0.75 x 0.5 1.00 2.2 2.80 6.20
0.75 x 0.75 2.50 5.60 4.20 9.30

Materials of construction

MaterialHastelloy, Stainless steel 316L, Stainless steel AL-6XN

Literature

Brochures

  1. ASEPCO weirless radial diaphragm valves (US).pdf
    PDF - 605.5kb

Datasheet

  1. ASEPCO block-and-bleed valve datasheet (EN).pdf
    PDF - 167.9kb

Actuators

AKS actuator series

  • Hygienic design with laser-etched serial numbers for full product traceability
  • Lightweight plastic construction with 304 SS sleeve and Nylon handle
  • Visual indication of open/closed status
  • 150 psig maximum sealing force

Diaphragms

Diaphragms

Available in silicone and EPDM Extensively tested to ensure long service life Patented, leak-free static shoulder seal High performance with minimal maintenance

Order Information

Product codes

Block-and-bleed valves product codes

Model Code Part Description
BC05-125-1 Weirless valve 0.5”, Block & Bleed, 316L Clamp-end inlet, Clamp-end outlet, 2.75” Face-to-Face & 0.5” bleed valve with clamp-end outlet, 20 micro‑inch Ra surface finish, electropolished and passivated, includes body/actuator clamp
BC08-125-1 Weirless valve 0.75”, Block & Bleed, 316L Clamp-end inlet, Clamp-end outlet, 3.75” Face-to-Face & 0.5” bleed valve with clamp-end outlet, 20 micro‑inch Ra surface finish, electropolished and passivated, includes body/actuator clamp
BC08-126-1 Weirless valve 0.75”, Block & Bleed, 316L Clamp-end inlet, Clamp-end outlet, 3.75” Face-to-Face & 0.75” bleed valve with clamp-end outlet, 20 micro‑inch Ra surface finish, electropolished and passivated, includes body/actuator clamp
Note: for additional configurations, please contact Watson-Marlow.

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