What is the difference between HP/ANSI and HP/DIN series?

The HP/ANSI series is designed for American pressure class ratings (Class 150, 300, 600) and dimensional standards (API 609), while the HP/DIN series conforms to European PN ratings and EN 558-1 face-to-face dimensions. Both offer similar performance and material options.

Is the FLOWSEAL butterfly valve suitable for fire-safe applications?

Yes. The "Fireflow" variant with metal seating is certified to API 607 4th Edition fire-safe testing. This makes it suitable for flammable hydrocarbon service in refineries and petrochemical plants.

What actuators are compatible with FLOWSEAL valves?

FLOWSEAL valves can be operated by lever, manual gear operator, or automated with pneumatic and electric actuators from the Crane REVO actuator range. PC Engineering can supply complete valve-actuator assemblies.

Can these valves handle vacuum service?

FLOWSEAL valves are primarily designed for positive pressure applications. For vacuum or combined pressure/vacuum duty, contact our engineers to confirm suitability based on size, temperature, and media.

What spares are available for FLOWSEAL valves?

Common spare parts include seat rings, disc seals, shaft seals, and bearing bushes. PC Engineering can supply genuine Crane replacement parts and repair kits.

CRANE CHEMPHARMA & ENERGY · BUTTERFLY VALVES

Crane FLOWSEAL High-Performance Butterfly Valves - Series HP/ANSI & HP/DIN

Name: Crane FLOWSEAL High-Performance Butterfly Valves - Series HP/ANSI & HP/DIN
Brand: Crane ChemPharma & Energy

Crane FLOWSEAL high-performance butterfly valves for industrial process control. Double eccentric design, fire-safe options. Available at PC Engineering

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Overview

Crane FLOWSEAL High-Performance Butterfly Valves are bi-directional, double eccentric quarter-turn valves engineered for demanding industrial process applications. The double offset design reduces seat wear and provides tight shut-off, making these valves suitable for throttling and isolation duties across a wide range of media and temperatures.

Available in two series — HP/ANSI for American standards and HP/DIN for European standards — these valves offer flexibility in material selection, seating options, and pressure ratings. The "Fireflow" variant provides fire-safe performance certified to API 607, making it suitable for flammable fluid service in refineries, petrochemical plants, and power generation facilities.

FLOWSEAL butterfly valves are designed for long service life with minimal maintenance. The robust construction and choice of soft or metal seating ensures reliable performance in applications including HVAC systems, pulp and paper processing, water treatment, and chemical handling.

Key Features

Bi-directional double eccentric (double offset) design for reduced seat wear
Soft-seated and "Fireflow" fire-safe seated variants available
Wide temperature range: -70°C to +250°C (HP/ANSI) and -70°C to +230°C (HP/DIN)
Multiple body materials: carbon steel and stainless steel as standard
PTFE and reinforced PTFE seating options for chemical resistance
Wafer and lug body configurations for flexible installation
Fire-safe certification to API 607 4th Edition
ATEX 94/9/EC and PED 97/23/EC compliant

Specifications

Parameter	HP/ANSI Series	HP/DIN Series
Size Range	DN50 - DN1200 (2" - 48")	DN50 - DN1200 (2" - 48")
Pressure Rating	ANSI Class 150, 300 & 600	PN 10, 16, 25, 40
Temperature Range	-70°C to +250°C (-94°F to +482°F)	-70°C to +230°C (-94°F to +446°F)
Body Materials	Carbon steel, stainless steel	Carbon steel, stainless steel
Seat Materials	TFE, Reinforced TFE (RTFE), Metal (Fireflow)	PTFE, Reinforced PTFE
Disc Materials	Stainless steel, SS nickel-plated, aluminium bronze	Stainless steel
Body Styles	Wafer, Lug	Wafer, Lug
Face-to-Face	API 609 Table 2	EN 558-1, Series 20 & 25
Standards & Approvals	EN/ISO 9001, BS6755 Part 1 Leakrate A, API 607 4th Ed., PED 97/23/EC, ATEX 94/9/EC	EN/ISO 9001, DIN3230 Leakrate 1, API 607 4th Ed., PED 97/23/EC, ATEX 94/9/EC
Actuation	Lever, gear, pneumatic/electric actuator (REVO range)	Lever, gear, pneumatic/electric actuator (REVO range)

Applications

FLOWSEAL high-performance butterfly valves are widely used across process industries where reliable isolation and flow control are critical:

- Power Generation — Steam, cooling water, and condensate systems - Water & Wastewater Treatment — Raw water intake, chemical dosing, sludge handling - Pulp & Paper — Stock preparation, chemical recovery, bleaching lines - HVAC & Building Services — Chilled water, heating circuits - Chemical & Petrochemical — Process isolation, flammable and corrosive fluids - Oil & Gas — Fireflow variants for hydrocarbon service

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Frequently Asked Questions

Get a Quote

Contact PC Engineering for pricing, availability, and technical support for Crane FLOWSEAL High-Performance Butterfly Valves. Call us or fill in our inquiry form — our engineers will respond within 24 hours.

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